According to a ProtonDB user the specific crashes I am referring to have been finally fixed with 545.29.02. So two weeks ago for a 5 years old card. Good job Nvidia!
I would have loved having that earlier, because I threw mine out after all the frustration with Nvidia and I still doubt that it is fully working now.
Don’t get me wrong it’s great for others stuck with Nvidia hardware though. I would never ever recommend buying any Nvidia hardware for Linux though. The experience is miserable compared to AMD.