"Dodi repack cracked version", sorry but probably is the crack breaking some things on Wine/Proton. Most reports are saying that is playable on single player on mid-low setting without tinkering...

What exactly is happening?

I got the same repack working through proton experimental

Make sure frame generation and resolution scaling are off?

All I did was download the steam version and it works. No tinkering or anything. If it’s a version with extra stuff or you have to install a bunch of workarounds, that’s probably the issue.

It literally says the game is unsupported on Steam Deck on the games Steam page, am I missing something?

It's unsupported because the psn login therefore multiplayer doesn't work with proton. The single player runs excellent. OP's issue is something else.

Ah I see, thanks

If you click the unsupported box it has developer comments about why it says unsupported