It's a Blizzard problem, not a Linux problem.

No iCloud Drive on Linux is an Apple problem right?

If I write software and I don't support macOS, it's not a fault of macOS.

Agree 100%, but it's also not a "problem" as you said with Blizzard. Blizzard as an entity made a decission to support only popular operating systems (Windows, PS5 OS and Xbox OS) for probably monetary reasons. That is not a "problem" but a choice on their end. That still doesn't justify GP's comment of "Just use Linux! It's betterer!!!!!one11eleventyone!". In an utopic world, everyone with a half brain would ditch Windows if the software they need would run fine on [insert other OS here]. In the real world, it's not possible.

StarCraft 2 and WoW ran great before Blizzard made the launcher not work. On the plus side, I mercifully no longer want to play the mediocre games of that horrible (soon to be owned by Microsoft like Bethesda? kekw) company. :D By being so unbelievably scummy and shitty for the last few years (aligning exactly with my shift to Linux), Blizzard and Bethesda have gone from my favorite game companies to my most hated, which is awful kind of them for eliminating the dilemma of dual booting.

Blizzard games work pretty well with Lutris. It handles all the Wine config stuff for average users who just want their game to work, but power users can tweak it. I've had Diablo 2 Resurrected and StarCraft 2 running for years with no hassle.

https://lutris.net/games/diablo-2-ressurected/

You clearly haven't checked in for a while. I've been playing Blizzard games and EAC games for multiple years now. They work great unless the dev specifically rejects EAC support. D4 and Dragonflight worked flawlessly on launch. Squad and other EAC games are also totally green.