Please rate my Generation 7 Let's go OU team

Question

Eevee-Starter (F)
Ability: Run Away
Happiness: 70
Naive Nature
- Sappy Seed
- Sizzly Slide
- Glitzy Glow
- Quick Attack

Articuno
Ability: Pressure
Level: 50
Calm Nature
- U-turn
- Ice Beam
- Roost
- Toxic

Melmetal
Ability: Iron Fist
Shiny: Yes
Happiness: 70
Adamant Nature
- Double Iron Bash
- Rock Slide
- Earthquake
- Thunder Punch

Aerodactyl-Mega @ Aerodactylite
Ability: Tough Claws
Shiny: Yes
Happiness: 70
Adamant Nature
- Rock Slide
- Crunch
- Earthquake
- Roost

Venusaur-Mega @ Venusaurite
Ability: Thick Fat
Level: 50
Shiny: Yes
Happiness: 70
Bold Nature
IVs: 0 Atk
- Mega Drain
- Leech Seed
- Sludge Bomb
- Protect

Gyarados @ Gyaradosite
Ability: Intimidate
Shiny: Yes
Jolly Nature
- Outrage
- Earthquake
- Waterfall
- Crunch

Comments

By the way, if you didn't know, this format don't support EVs, DVs or AVs.

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Why are some Pokemon level 50?

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For some reason when you go in a battle with a Pokemon once in this format, they strangely turn into level 50s, and some of the members are new that's why, and I'm running a Physical set Eevee, also, Quick Attack is not the worst move, it has boosted priority.