7:09 Teamcomp is ok. I would replace the Zenyatta with a Lucio (Zen is only really great on defense, Speedboost beats Discord on offense). If he doesn't switch you should probably just go Roadhog. Good Synergy with Discord and more Ult charge  for the Supports.

7:42 The plan was to go bottom. Just go bottom. Theres no point in standing on the street and trying to fight people who are on the highground. You and your team are just wasting precious time.

7:55 You need to focus more. You are just randomly spraying from target to target. Its alot more effective to just tell yourself "Ok, I am going to kill this Mei now" and then actually focussing her until she dies or you can't shoot at her anymore. This way you had 0 impact the entire fight, because you couldnt actually finish anyone off.

8:25 Stop jumping around so much. You really don't have to, just strafe.

8:38 Don't take a fight against Mei. You can't win it. As soon as you saw the Mei you should've just ran away.

8:48 Again, stop jumping around so much.

8:56 You don't have to ult here. Check the kill feed. The fight was already in your favor. Don't use your ultimate just for the sake of it. Only use it to win an objective. That objective was already won, it would be alot better if you had saved it in case they want to retake later. Also you didn't really prepare it. That D.va was still in her mech, chances being that she could just block everything. Ask yourself "How would the fight have gone without me using my ultimate?". In that situation: Exactly the same, but you would have your ultimate still up.

9:14 You shouldnt even stand so close to their entrance. Whenever you capture an objective, stand next to the payload, so that you may use it as cover. You stood right there because you thought you had the point in the bag already, and then they just take it away from you. Don't think something is won until the game literally tells you it is. That point was not "won". So don't behave as if it were yours already. If you had been further back, you could have gotten into cover against that Soldier ultimate, and once it ran out, you could have countered it with your own if you hadnt wasted it earlier. So an ultimate that could potentially have saved the point, was used to get a single kill that you couldve gotten with leftclick too.

9:30 That Ana really wanted to hear something different than "22%" here :D

9:36 That Biotic field was completely wasted. What did it do? What would have happened if you didnt place it? Would you be at a disadvantage? Would someone have died? If no, don't use it!!!

9:47 Boy that Hanzo could really use a Biotic field right about now. All your mistakes so far were consequences of you doing unnecessary things. Soldier ult to kill 1 enemy earlier? Unnecessary. Biotic field to heal your Ana? Unnecessary. Jumping around? Unnecessary. Wait for opportunities to arise, don't force them.

10:09 Just keep shooting at the Reinhardt Shield! Don't take a break in the middle of a shield war!

10:10 I want you to check your positioning here. Who can you see? You can see you? Who stands in front of you? Who stands behind you? Zarya and Ana stand in front of you, which is pretty bad on their Part, since they cant heal or shield you. And Reinhardt stands behind you? Where he is completely useless? Ok now consider what kind of advantages and disadvantages you would have if you stood a little further back. Disadvantages? Not really. Advantages? The enemy team cant see or shoot at you anymore, Reinhardt could block damage for you, and you are still just as effective since you dont have any falloff damage at that range. So you overextended for no reason. Just think about stuff like that ingame. Commentate what you are doing. "Alright I am walking out of here past my Ana and Zarya to... oh wait" and you will notice these mistakes soon enough and most importantly, by yourself.

11:02 Just look at your positioning again. Did you really have to stand this far forwards? How much can you walk backwards without becoming useless? Just make that thought experiment. Walk 1 meter back. Is that position better? Are you safer? Yes. Are you less effective? No. Go another meter backwards (or yards, whatever floats your boat). You will VERY QUICKLY realize that you are standing so far forwards for absolutely no reason at all. And you are making yourself an easy target for enemy ultimates and shots.

12:25 Yeah the cooperation is nice and all, but it didnt lead to a good result. IF you want to play Mercy Ana (Which is pretty bad in of itself) you NEED to run a 4th tank. 3 Tanks and 2 HPS beasts like this is totally overkill. It would be alot better to replace the Mercy with a Zenyatta, or if she doesnt want to switch you can go for another Tank (D.va preferably) just so that you can get Ana Mercy to work.

13:46 What was that Biotic field for? Lets ask the questions again. What would have happened if you didnt use it?  Would anyone have died? Would you have missed out on free ult charge? I don't think so. It has a SIXTEEN SECOND CD. SECHSZEHN SEKUNDEN IS WHAT WE GERMANS SAY. Thats pretty damn long. You trust me, you will need your Biotic field in the next 16 seconds 99% of the time.

14:46 Nooo! That was a really good position. Never give up highground with a really good reason. What was your reason there? Why did you drop from highground but the 3 teammates you can see at 14:49 didn't? Are they more tanky then you? No, the Mercy stands up there. Did your healer die? No, the Mercy stands up there. Was there a reason for you to drop down without a fight? No, the Mer YOU KNOW WHAT I AM TRYING TO SAY. Dont give up a good position unless you REALLY have to. (I.e the objective has to be contested or you will die if you stay there.

15:29 Same thing. Why drop down? What has lead you to the conclusion "I really have to get off this Highground!"? It can be hard to have these thoughts in game, but eventually it will become instinct. Wait for something to happen, then react. You are always trying to do something. You don't have to, especially not on defense. Let them do stuff and you react to it. You need to be in control of the game. Its like playing Mario kart against your little brother. You arent going full speed just so you can wait for 3 minutes after you finished until he crosses the line. You drive normally, give him the perception of having a chance, you don't show him your full potential, and only when he starts catching up you accelerate and tell him "no you little piece of shit, i have the pubes in this room". Same thing in overwatch. Dont show the enemy team what you have all the time. Only show it to them when they are figuratively asking for it.

16:24 Alright lets get into some Theory here! Your team has 6 Ults, and the enemies have 1 minute to Attack. This is the time where you should start thinking about your win condition. "We are pretty close to winning, what needs to happen, how could i fuck this up?". Start by thinking about how many more pushes the enemies will get. On average you can expect a push every 20 seconds, although its usually more like 30 seconds. So lets say they will get 3 more pushes. And you have 6 Ults. Try to think about how you will use them. Well, Nanoboosted Soldier Ult will win you 1 fight. Graviton Surge-Full Hog will win you another, and Earthshatter will win you the last, and in case anything goes wrong, Mercy can come in with the rez. Now that you have this Information (wasnt really that hard to come up with) you can share it with your Team! Tell them "alright lets try to win the next fight only with nanoboosted soldier ult, and save the other ults in case something goes wrong". THIS GOES A LONG WAY TRUST ME. Nothing worse than blowing all 6 ults, the enemies push again and fuck you in the last 20 seconds. THIS IS HOW YOU CAN PREVENT THOSE LOSSES!

16:25 BEEEP! WRONG! We got such a nice plan but for some reason you decide to drop down from Highground. Again for like the 10th time so far. And for the 10th time it does you no good. If you had just stayed up there you couldve used your uuuuult and kill the pharaaaaa and win the gaaaaame(or draw...whatever) but you risk it because.... you are afraid of heights?

Ok so in summary:

stop jumping
dont be afraid of heights
stop using your abilities for no reason


And you will EASILY climb. Aim is fine, so the only thing that needs fixing is your mental game, your mechanics are good.