Hi @benjiro,
Sorry to hear that.
It appears you ran into an Access Violation crash and I notice you have a Ryzen CPU. I recommend to try lowering your ‘Worker Threads’ count. Please check this article out:
Let me know how you get on.
Ah okay 
it seems you’re still running into an Access Violation crash.
Can you try switching from DX 11 to DX 12 and see if stability improves?
I also recommend running through our general ‘go to’ crash solutions here:
Hm, so your most recent log actually indicates a GPU-related crash this time.
I appreciate you have already tried a few of these, but it’s worth ensuring you’ve run through all of the potential solutions here:
The crash report shows another GPU-related crash 
When performing a Selective Startup did you disable all of your background applications? They’ll differ between individual setups, so you’ll want to try disabling all of your startup items and re-introducing them one-by-one.
Sorry to hear that 
Being honest, as you’ve exhausted all of the ‘go to’ options I’m at a bit of a loss. I’m happy to contact Steam and request they process a refund for you - let me know if this is something you would wish to do.
No problem! of course feel free to continue posting 
hopefully a resolution can be found!
If you ran into a BSOD then it’s likely that the issue runs a little deeper.
You have a Ryzen CPU so it could be worth updating your BIOS. Please check out the April 2021 update in this article. Other potential solutions here may also be of help:
devtrackers.gg