I think this depends on point of view. I do think much of this comes down to sour grapes that they didn't let Elon control OpenAI, and this is the wedge he chose to retaliate. Would he have sour grapes if he didn't want to win the AI race himself?

Really comes down to what you think his primary motivation is and what are just benefits.

That's fair although I didn't mean to imply that I thought it was a rational move. I think if he had won, it might have actually been worse for him (who knows what the collateral damage to the AI bubble would have been). I just think his goal was mostly to do as much harm as possible to people he clearly hates.