I may be spoiled in that I don't play AAA multiplayer games, but I do play AAA single player and indie single/multiplayer (usually the type where one of the players is also the server, e.g. Terraria).
Been running Linux on my systems for more than a decade, and - especially since Proton/SteamDeck enchantments made their way upstream - I haven't had any major ssues (except having to wait a while to play RDR2-PC in Ubuntu because of a weird game-specific graphics card driver issue, but even that was fixed in due course).
Fuck Windows, and fuck the assertion that it's the only way to run games.