Comes off to me as a guy who's just tired of the project after 10 years. Understandable that he finds annoyance and frustration in so many things. It's like a marriage that has reached the point where one or both partners have decided they don't want to be together anymore.
As an outsider, to me the list of complaints sounds kind of petty and whining. Better to just say "I'm moving on, I wish everyone the best" and be done with it.