It seems like the real sour grapes are over the fact they wouldn't let him run OpenAI. If he cared about a payday, ironically, he probably would have had more success because he would have brought this suit sooner.

It's hard to know without knowing the terms of the settlement. It could have easily been something he knew OpenAI would find to be unacceptable.

I think regardless it would be extremely hard for him to make people hate Altman et al. more than himself. Altman's flaws are more subtle and require paying attention to a pattern of behavior. Musk has beem pure cringe for 5+ years now.