Sorry to hear this.
The first crash is GPU-related, though it’s not clear as to why. I can see you have up-to-date drivers and you’ve mentioned having tried several solutions already. I can only recommend to try our other solutions if you haven’t already e.g. disabling background apps, changing DirectX version, lowering worker threads etc. in our article, here:
As for the second crash, this one is actually a code-related engine crash which is already on our radar. We’re on the case!