I'm sorry, but a hit job he conducted on himself?

You can agree or disagree with his position on exporting to China being good/bad for nVidia or the US. But actively working closely with a company (Megaspeed) where, from a thousand miles away, it was clear that their primary goal was to get around and/or bend US export controls... that's a bad idea. Megaspeed was clearly working for the direct benefit of the Chinese government.

Add onto that having an extramarital affair with the representative of that company? Come on, it's extremely likely she's an agent of China, and if not it's a gigantic business risk.

Then, on top of that, you have to remember that he's married. A divorce results in half of his shares going to his wife, who would then have a grudge, probably not in the best interests of the comapny.