Except for games with anti cheats, can you quote from your head three games the last 10-15 years that aren’t running perfectly on Linux ?
Because from my ~1 500 titles steam library, I can think of one game that I had issues with. And even this particular game (which is Tomb Raider 2013, btw) worked perfectly fine after a little hack. And ironically the "hack" was checking a checkbox in Steam to force using the Windows version of the game instead of the official Linux port.
Do you have anything more tangible than "lol"? Looking at the most played steam charts, there is about 10% that has anticheat that does not work on linux.
In the top 10 I see only 3: pubg, apex, and rust (no idea about delta force) but unplayable on the steam deck and whether the anticheat filters out linux are not the same.
Because from my ~1 500 titles steam library, I can think of one game that I had issues with. And even this particular game (which is Tomb Raider 2013, btw) worked perfectly fine after a little hack. And ironically the "hack" was checking a checkbox in Steam to force using the Windows version of the game instead of the official Linux port.