Arch is the best for gaming. I got steam and red dead redemption 2 running on my 15yo gaming PC with arch. Steam deck knows wassup.
Discussion
Freshest kernel, libraries and drivers usually work out well for gaming!
It works the best for everything. Even now, I have some bugs in Ubuntu that I *know would not exist in arch... Rolling release is the only wtg.
I'm running Ubuntu right now but I am looking to switch to something else. Was thinking Pop! or Arch.