The fact that everyone has to classify one another. Pokémon has in it's favor that it's diverse in the way of teambuilding and in that regard, people (plebs, if you will) Feel the need to hate on you for not doing the exact same thing. The idea of the games is that everyone takes a different approach in taking the win, and not doing things exactly the way you do is not a crime. This includes, but is not limited to Karenfags and Smogonfags. Just shut your judgmental, elitist fucking mouth and enjoy the games the way you like it best. There's no reason to refrain yourself from telling what strategies or Pokémon you use, but that's not a green light to rip on anyone else.
Protip: If you get mad, this comment is probably about you.