I migrated almost everything on Linux and, low and behold, the only game giving me issues is DOTA2.
I’m using Steam flatpack, it runs, I can play against bots, I can spectate games. The moment i try to play in matchmaking a VAC messadge pops up preventing me from starting a game.
I tried reinstalling, veryfying the files, installing on a differend hard drive, scanning the disks for errors.
Flatpak usually works fine with anti cheat. More likely a proton issue like other people are saying
Indeed, that seems more likely.
Anti Commercial-AI license