This is not a huge issue though. The game runs perfect on Proton on Linux, the problem is really just on the Steam Deck it had poor performance. But on the average desktop it runs flawless.
I'm just happy the Steam Deck seems to be pushing devs to make sure their games run on low power hardware. Really any game should be able to run fine on the Steamdeck, there's no gameplay that isn't possible to run on the hardware. It's just the lack of engineering time spent on making sure the graphics have a proper low option.
The existence of "steamdeck" as a graphics preset in a bunch of games is really a boon for anyone using a gaming handheld, especially as hardware improves. Provides a bar for manufacturers to clear too.
I'm just happy the Steam Deck seems to be pushing devs to make sure their games run on low power hardware. Really any game should be able to run fine on the Steamdeck, there's no gameplay that isn't possible to run on the hardware. It's just the lack of engineering time spent on making sure the graphics have a proper low option.