In response to your initial question, I believe everything must be criticized, especially things we like. Internal criticism, such as criticism of Windows, is just as important as external competitors, such as Linux.
Take a look at https://areweanticheatyet.com at some of the biggest games on the planet, and how most of them don't support Linux or Proton.
I feel you on liking things about Windows though. I'm a Windows guy by nature. I genuinely like the OS, and if Microsoft wasn't being so absurdly user-hostile I would switch back in a heartbeat.
There's also more friction with gaming on Linux the moment you step off the beaten path (i.e. Steam). Yes, yes, Lutris etc, but you're still going to run into things that refuse to play ball from time to time. You can generally solve these, but it's friction you don't get on Windows, and that you might not be in the mood for when you want to play a game.
I've been a gamer on Linux for years too. I'd say it's ~80% there. (95% if you don't play competitive triple-As and stick to Steam.) It drops dramatically though if you want to play oddball 90s and 00s games, or use modding tools, etc.
Personally, I've been toying with the idea of putting Windows on my gaming PC again, after many years. It's not my daily driver, so I'm not too fussed what runs the actual games. My time is limited and valuable to me, and I do not want to spend it nailing down cryptic Proton incantations (admittedly rare, but not yet rare enough). I love tinkering, but that's not tinkering, that's a chore.
Windows simply offers a cleaner, more well put-together experience when it comes to these edge cases. I have many tiny nitpicks about how Linux behaves, and every time I go back to my Windows Enterprise install it is a breath of fresh air that my 170% scaling and HDR just work. No finagling with a million different environment variables or CLI options. If a program hasn't opted into resolution independent scaling then I just disable it, and somehow the vector elements are still scaled correctly, leaving only the raster elements blurry. Nowadays laptop touch pads feel like they are Macs, which is high praise and a sea change from where Windows touch pads were about a decade ago.
If you strip away all the AI nonsense, Windows is a genuinely decent platform for getting anything done. Seriously, MS Office blows everything else out of the water. I still go back to Word, Excel, and PowerPoint when I want to do productivity. Adobe suite, pro audio tools, Da Vinci Resolve, etc, they just... work. If you haven't programmed in Visual Studio or used WinDbg then you have not used a serious, high-end debugger. GDB and perf are not even in the same league.
As a Windows power user, I want to go back to the Windows 2000 GUI shell, but with all the modernity of Windows 11's kernel and user-space libraries and drivers. I wish Enterprise was the default release, not the annoying Home versions. And I really, really wish Windows was open-sourced. Not just the kernel, but the user mode as well, because the user mode is where a lot of the juice is, and is what makes Windows Windows.
Witcher 1/2 at least also worked OOB via steam.
For some context/ user comments, see Deus Ex HR[0] and System Shock 2[1] on protondb.
[0]: https://www.protondb.com/app/238010 (gold, deck status: playable) [1]: https://www.protondb.com/app/238210 (platinum, deck status: playable)