My experience is similar to yours, except that some of the Proton games have bugs, but still run quite excellently regardless, and most all of my Linux-native g

My experience is similar to yours, except that some of the Proton games have bugs, but still run quite excellently regardless, and most all of my Linux-native games run perfectly, but the few that don't do once Valve's "Steam Runtime for Linux" containerized thing is selected as a compatibility layer. Most games I play on Steam though just run when one clicks "Play", regardless of whether they're Linux-native or running via Proton (with the exception of those few that are still choosing to be actively Linux-hostile by purposely refusing to enable BattlEye or EAC despite Valve's efforts to make it increasingly simple for devs / publishers to do so).