To be fair, a lot of the ill will toward him seems to be the rant he went on and how he conducted himself. While he is indeed entitled to his opinion, we are just as entitled to form opinions of him based on his conduct. I, personally, don't care much about him either way, so all I can say is that if he wanted to leave the fandom, he could have done so with a lot more grace and the vilifying on this thread probably wouldn't be happening.
Just my take on things. Feel free to do with that what you will. I'm honestly amazed this thread is still going. It's just one guy leaving the fandom, not like the show was cancelled or anything. Woop de freaking doo.