I've used Ubuntu since 2006 and started using Kubuntu (I prefer KDE) about 2 years ago. Ubuntu (or Kubuntu) are very solid for gaming. It puzzles me how often I see highly customized distros like Bazzite and CachyOS touted for gaming after looking into some of the wild tweaks those distros do; it's amazing to me that they run at all.
PS I keep Snap disabled.