I tried running it by changing to different versions of Proton in steam, installing PhysX by renaming the files, etc. The problem im facing there is that there will always be a Popup that the program is not responding, which appears over and over again. The only thing that worked for me is using the autosetup of the GOG version in Lutris. I still get one Popup that it is not responding but after clicking wait it works perfectly fine. There is probably a way to get the steam version also working, but it's just too much of a hassle, so Lutris it is. I hope this will help someone with the same problem!