The problem is the founder is still a thin-skinned whiny jerk that made it about ‘his poor feelings’ and doubled down.
That’s not at all what happened, and I think you’re seriously lacking empathy here. He explained he reacted emotionally, and he’s still emotional. This is in no small part his baby. He made the decision to step down before this ever happened because he wanted someone that could do it better at the helm, he realized he had been promoted past his competency, that’s not nothing.