Review for: https://www.youtube.com/watch?v=tXzP7pA0bQM&t=8s

0:24 Not sure why you're re-positioning here instead of helping your team take down the enemy Rein shield. Use the corner and your own Rein shield as cover to help kill it.
0:54 Instead of sitting about saying nothing, tell your team that they can push in because their Main Tank is dead. Communication is huge in this game.
1:02 Try not to get too engrossed in killing Symmetra turrets, yes they do damage, but you have a shield that regens very quickly, moving and helping your team is more important, your Rein dies as a result of you look around for Symm turrets.
1:02-1:08 Watch your aim in this clip, it doesn't look like you're comfortable with your sensitivity at all, I would recommend adjusting it to a sense that matches your mouse movement.
1:35 You should be backing out way before this. Try and regroup with your team, even if it's at spawn.
1:43 This leads in to the above tip, if you were regrouping, you would not have needed to trans and could've saved it for the next fight.
2:14 Solid discords, there is absolutely no reason for you to point-blank chase a Rein however, that isn't a 1v1 you win.
2:19 Look at the right side of your screen at this point. You shouldn't be focused on killing this Reinhardt at all, call out instead that he's there to your team and focus on keeping your Rein alive.
3:11 NEVER put yourself into a bad situation to help a teammate. NEVER.
3:48 Your entire team is on the payload, look to take the high ground instead of pushing it with them, they're moving it, just get yourself to a safe position.
3:53 There was no reason to use trans here, you heard the Lucio ult go out, just save the trans for the next fight.
5:20 You recognized that this is a lost fight and still went back anyway, why?

Overall you need to be more aware of the situations you're in and your teammates around you. Make an active effort to keep orbs cycling rather than spamming left click on a person.