Hey,
I'm using a Xbox series X and I have constant crashes. I have made it past character creation though but not very far until it boots me back to home page. I've tried everything like you say too, but to no avail. I'm probably just going to leave it until something gets sorted. It's really disappointing as from what I could play I enjoyed. Imagine xbox games studio publishing a game that can't even run on their "highest performing" consoles. The only next thing I could suggest is clearing your cache on your Xbox, but at this point I don't think much is going to help sorry :/