He still comes across as a jerk, contrite only to try to get people to stop harassing him. Seems like he can't shut up because his ego just won't let go.
This concise explanation / apology (and say nothing else) would have gone a long way, and it might even be somewhat true:
Right or wrong (and Dave was right), no customer deserves to be treated the way I treated Dave. My lashing out at others in the gaming industry was just as bad. I apologize unconditionally to each and all of them.
Between running a company and raising an infant, sleep has eluded me. Sleep deprivation can have profound effects on people. Some of you who have raised children might understand. This in no way excuses my behavior: I'm only saying it to let people know what propelled me down such a terrible path.
Add another line or two about how he hopes his behavior won't kill such a great gamer product, and done.