Nobara OS, Arch Linux and Pop!_OS beat Windows 11 by a slim margin in fps (delta 8) in Windows native games - Cyberpunk 2077, Forspoken, Starfield and The Talos Principle II. Windows 11 wins in Rachet & Clank.
ComputerBase’s testing was done on an all-AMD test rig, featuring a Ryzen 7 5800X (non-3D) and a Radeon RX 6700 XT.
Update: Windows 11 wins in one game.
I switched to Mint this month and have only run into issues with anti-cheat. I’ve tried about 8 different games. Halo Infinite had some odd textures the first time I ran it, but not since.
All in all I’m very happy with my OS switch.