We’ll never know exactly what exactly transpired, but I think the existing evidence is clear that as President of Y Combinator he should not have been also as involved in OpenAI as he was.

This is a conflict of interest and I think one a very obvious one. He tried to have it both ways and was forced to choose in the end. I think putting himself in that situation rather than resigning up front to pursue OpenAI ambitions says a lot about his character.