I think every question must be titled "How Can I improve my team (Generation here)"
It should include 6 Pokemon,Movesets,EVs,Held Items,Nature,Role.
Each one of these will help the person answering to know what to change and what not. e.g. Dragonite has two roles,Sweeper and supporter,for supporter you need different moveset,EVs,Nature,Items than the ones you need on a Sweeper Dragonite,and there are Physical Dragonites and Special ones,with each having the different things I enlisted.