As one of the few in this forum that actually saw Johnny play I have all the respect in the world for what he did for the University as a player and coach. BUT he was an arrogant egomaniac who in the end was hoisted on his own petard by his hubris and complete unawareness of his tenous situation after losing 7 in a row to Alabama including at least 3 games where he had equal or superior talent.
If you are the HC at Tennessee and lose 7 in a row to the Tide you don't go out and call your bosses out in public. He left Dickey and the Johnsons(Joe and Bill) no choice but to let him go. I have criticized Fulmer in the past but the only way he knifed Johnny in the back was by beating Florida and UGA with the same team Johnny lost to Arkansas, USC and Alabama with. Ironically Johnny and Bill Johnson were teammates on the undefeated 56 team. I dont think Bill was working behind the scenes to screw over his old teammate.
My understanding was Johnny was off the sauce during this time. There is some speculation that the heart medication he was taking affected his behavior.
Paul Hornung didn't deserve the Heisman in 56 but far and away the best player that year, and maybe all time, was Jim Brown of Syracuse who was denied the trophy since he was black.