Complains on the internet because he knows he has an audience.
Dude hopes that this show can help him get his job back.
He booked a flight out of China immediately after. He in no way is trying to get his job back, and in his statement makes it pretty clear he'll likely never host again.
He also had no intention of actually releasing any of that information and fully owned up to being fired, until Gabe Newell publicly called him an ass. Then he decided to release it.
In which he does not insult Valve or Gabe in general, tells the fans to continue to support them and Dota2 in general, and wishes everyone well.
So yeah, your summary of events are a little off.
But I don't blame you. Everyone has already made up their mind at this point on who's right and who's wrong, and no amount of evidence or common sense is going to change that.