I view it as Valve is doing me a favor by adding friction towards me installing a rootkit to play video games.

There's also been numerous userspace ACs that work well and also run in userspace (EAC, Battleye, etc.) that have been enabled for Linux/Proton users (including by EA with Apex Legends at one point). A lot of the support for Linux mostly comes down to the developer/publishers not wanting to and not because of technical reasons.

on the other hand you can't play any of the older battlefields due to cheating (not like "is he cheating?" more like blatant "this guy is speedhacking and heashotting everyone" cheating that the server could easily detect if they cared about it)