Just tried my team and it's really bad. It loses constantly to pretty much everything and I don't know what to do.

Togedemaru (M) @ Steelium Z
Ability: Lightning Rod
EVs: 4 HP / 252 Atk / 252 Spe
Jolly Nature
- Fake Out
- Spiky Shield
- Zing Zap
- Gyro Ball

Gyarados (M) @ Life Orb
Ability: Intimidate
Level: 50
EVs: 4 HP / 252 Atk / 252 Spe
Adamant Nature
- Crunch
- Ice Fang
- Dragon Dance
- Waterfall

Pelipper (F) @ Damp Rock
Ability: Drizzle
Level: 50
EVs: 252 HP / 132 Def / 124 Spe
Bold Nature
- Tailwind
- Wide Guard
- Scald
- U-turn

Tapu Bulu @ Assault Vest
Ability: Grassy Surge
Level: 50
EVs: 156 HP / 252 Atk / 100 SpD
Adamant Nature
- Horn Leech
- Wood Hammer
- Zen Headbutt
- Rock Slide

Muk-Alola (M) @ Sitrus Berry
Ability: Gluttony
Level: 50
EVs: 252 HP / 92 Atk / 164 SpD
Sassy Nature
- Taunt
- Knock Off
- Poison Jab
- Protect

Xurkitree @ Electrium Z
Ability: Beast Boost
Level: 50
EVs: 4 HP / 252 SpA / 252 Spe
Modest Nature
IVs: 0 Atk / 30 Def
- Thunderbolt
- Grass Knot
- Hidden Power [Ice]
- Protect