Although for some of us this is a well-known problem, it has appeared again with the release of DOOM: The Dark Ages so it's worth a quick PSA to remind people about Denuvo activation limits with Proton on Linux, SteamOS / Steam Deck.
Honestly, Denuvo makes me want to sail the high seas. When I browse Steam and see Denuvo, I mentally write off the game, saying "Might buy this in a couple of years if they fix this shit." If the company fails to do so, the game becomes valid to pirate, far as I am personally concerned.
Because Denuvo games take a long time to crack, and only a few people can do it reliably? There are games released as far back as 2018 that still haven’t been cracked.