From the games I would play:
Not supported, broken, a lot of effort to even get to work a little. And that's provided you forget about external tools that this games essentially is required to use to even be usable as the stock launcher is poor and an external one 3rd party is used by majority of people. A lot of "silver" doesn't work, doesn't work, need to compile this, need to compile that yourself, typical Linux hackery. And it has major issues with ingame UI which the game runs as python apps.
A different game then, native support but when you click on it it suddenly says platinum and there are reported issues again, so well don't need this Wine clone if one can download the native version and spare oneself the hassle of wrappers.
Other two games, again native and then when opened platinum and the other silver.
Native, gold, platinum, native, native, native, ...
Depends what one plays, indie games often launch on multiple platforms easily and with native for Linux sooner or later, often it's ported by some company or the devs later if game is successful.
Big budget games... nah, forget it, no native, console and PC at best with passable performance and endless obstructions to be able to wrap and port it to Linux.
It's not even the games that are big a problem of Linux's usability, it's the broken distro community, too many options but only few are actually usable, endless hardware problems depending on hardware platform, lack of support for latest hardware features, adaptive sync took ages if it works now, HDR? as far as I know nope, and most importantly missing programs with poor open source equivalents. It's fine for normies and linux geeks who want to spend lives in CLI but for people who prefer to get stuff done and programs to have wide native support Windows is still the way to go.
Then comes the whole Proton performance problems, tons of games reported platinum, gold, silver... yet reading reports they say: runs fine but the frequent stutters are annoying, or runs OK but cutscenes don't work and so on. Just because it runs doesn't mean it's actually in a proper working state.
And often it's a goodbye all DX12 games too.
It's cool and a lot of work and now money from Valve has been sunk into it but it will never be as good as supporting devs to make their games native for multiple platforms, considering the sometimes lacking features on Linux I don't really blame them for not even wanting to port their babies to something where they have strip features off and change the graphics in a big way. Sure they could from start develop multi platform but not everyone is that smart or can due to publisher/etc. who holds the money and dictates what will be or not be done.
I would rather dual boot and play native games on Linux if they run faster than bother with Proton/Wine/...