Hello and thanks for the donation!
1) Yes, the resolution option is still a bit buggy. I'll try to fix it in the future.
2) I'm glad that you were able to fix the issue. Any setting between 50 and 100 should work. Did you download the most recent version? Because I thought that I was able to fix it. AI cars are also extremely loud, aren't they? It's the same bug, but it's easy to fix by just lowering its volume slider.
3) Yes, some people have a blurry screen with v0.3.8. That's why I've added the resolution option.
4) Did you manage to make the steering yoke and/or XBOX controller work?