I've figured it out, i only get like 5-10fps in this game if i run it on linux. it doesn't matter if i use an nvidia gpu, an amd gpu, run the exe through wine or run it natively through the .sh script.
It's basically just broken on linux.
On windows it worked fine.
On mesa drivers (so intel and amd gpus) you can run it with zink, that somehow fixes it, on nvidia it breaks with zink so nvidia users are just fucked i guess, unless they use nouveau and nvk but this one game probably isn't worth the trouble of switching off the proprietary driver.