Need Advice pls

[zeus408]

MRGG-WWWW-WWXW-2828
What did i do wrong and what mons should have i picked?Starmie recked my milotic w thunder and my mence w ice beam
Also i used the same mons against a team with a porygon 2 and it used trick room and i got destroyed,
it had ice beam to take out my Mence and it took out my snorlax.
Battlespots doubles suck cuz u can only pick 4 mons and i couldve picked kartana to counter pory2
my Team i used in video https://pokepast.es/25a3080885b0e780 (I Think i had Weavile)
and snorlax i used for video Snorlax (M) @ Iapapa Berry  
Ability: Gluttony  
EVs: 68 HP / 196 Atk / 244 Def  
Brave Nature  
- Return  
- Earthquake  
- Belly Drum  
- Recycle

im thinking about using this trick room counter mon set:
Oranguru (M) @ Mental Herb  
Ability: Inner Focus  
Shiny: Yes  
EVs: 252 HP / 140 Def / 20 SpA / 92 SpD  
Sassy Nature  
IVs: 0 Spe  
- Trick Room  
- Psychic  
- Instruct  
- Protect

just a Explanation of my team i linked @https://pokepast.es/25a3080885b0e780

mence is for taking out fire types like Incineroar,Dragon types,etc

tapu koko is for outspeeding water types/tapufini/greninjas/Metagross

Milotic is for Landorus Ts,Zapdos,Flying types and dragons

Nagan is for fairies,dragons.

Kartana is for annoying trick room setters like pory2,normal types,Water types,any mons w steel weaknesses

weavile is for dragons and fake out Flinch threats to my other mons.