Why do you assume there would be a balance? Maybe YC's reputation has just been going downhill for years. Also, OpenAI isn't part of YC. Sam Altman was fired from YC and it's pretty obvious what he learned from that was to cheat harder, not change his behavior.
The story I heard before the PR spin that came from Paul Graham later (where he tweeted that he never fired him and asked him to choose between YC and OpenAI) was that he was asked to resign. I don't have an official source, I heard this from multiple YC alumni. I don't know exactly what happened but based on what I've heard and actually having interacted with Sam Altman, it seems most likely to me he was asked to resign (which isn't technically being fired) because he does weird stuff. He claimed to be a chairman of YC which wasn't true, he barred other YC partners from running personal funds while he did it himself, and then all the further similar behaviors we've seen play out at OpenAI. Maybe you're right, but it seems to me he was "fired" and later there was some PR to smooth it over.
Sam Altman wasn't fired from YC.