Gaming is my only use case with windows, and I am filled with deep hatred each time I have to boot this OS.
The only stuff that is completely broken is Easy Anticheat and BattleEye, but those will supposedly be working when the new Steam Deck starts shipping.
Side note: if you end up dual booting your gaming PC, please learn from my mistakes and disable Fast Startup before you do. Otherwise you're going to have a bad time.