He worked his ass off and feels like he was treated like crap by a few people behind the scene. He was pretty much the voice of the attitude era and also did a lot of work behind the scenes. The people he's not fans of didn't do shit on the screen and probably could have been replaced without the "product" missing a bucktooth beat.
You notice he's not bitter towards guys like Prichard, Patterson, Brsico, Kerwin Silfies, and Jim Cornette.
