And lastly, Windows (even Windows 11), just works with everything. Any software you want, you just install it. On steam you don't have to check proton.db, you're 100% guaranteed for it to work. Any software you see, it works on windows.

This is not my experience at all. I was recently trying to play Command and Conquer: Tiberian Firestorm, an older RTS on Windows. I own the game through Steam. On Windows, the game wont open. It crashes immediately on launch. If i run the game in XP compatibility mode, it launches but when playing the game there is some sort of microstutter: every unit is blinking, the mouse cursor is blinking, and the game plays at a crawling pace. Also everything freezes whenever you move the camera.

When i boot into Fedora on the same PC, install with steam and launch with Proton, the game works fine. I was even able to install a resolution patch for windows to get higher resolutions available.

I find this to be a pretty common experience for me when trying to play older Windows PC games. There are quite a few I cant seem to get working (or playable) on Windows, but that work fine on Linux. I mostly play older games anyway so for me, Linux is more of a game console OS.

Sorry to hear Battlenet doesn't work for you. D4 is another one i play only on Linux, in thas case because i get some weird graphical artefacts when playing on Windows. I haven't bought the new expansion yet though, maybe after the holidays are over.