>>38957812All metas are shit anon, don't get fooled thinking it's a Pokémon thing. Yugioh people just copy paste the best decks and kill you in 1-2 turns and you'll see the same cards everywhere.
The Pokémon TCG as well does this. The fire emblem mobile game I reckon too gets specific teams that everyone wants to use. League of Legends and other mobas get their seasonal share of OP characters that are a must and people equip them using the best meta builds...
Fighting games are a bit better since they're still skill reliant and a player being better can still win with proper timings even in a bad matchup, but of course they'll be using meta characters, mirror matches are common because everyone wants to play the same guy.
Pokémon at least has more variety by virtue of having like 50 viable pokemon. The smogon ou list is big, and uu pokemon are still viable there. I'm the 3ds games I even used some mons below UU tier and it worked with type advantage