I did, and my question still stands. He’s not “quitting” so much as retiring with the feeling of a knife in his back...
It may be simply semantics. I guess he could have chosen to not retire and that's why he calls it quitting.
"Quit is a strong word, I know. Everyone I’ve talked to has repeated that I’ve had a marvelous career and that I’ve retired with honor. Maybe that’s true on paper; I guess that it’s reflected by the record. But that’s not how I feel. I feel like I’ve quit. And because I’m not a quitter, I feel I have to explain why — not that anyone is asking, but because perhaps they don’t know to ask."