Got screwed by the system? Depends on your point of view. If you think he's a victim of circumstance and was forced by pressure to become a rapist and cannibal, then I guess. Poor Mike, he's only been forced into this by society, like George Foreman, Lennox Lewis, and Evander Holyfield. No, wait a minute, none of them, not even Larry Holmes, is a raving psycopath.
Now, if you say he's pissed because even boxing has some (though not nearly enough to save a dying sport) limits on tolerance, then maybe I could see a point. It did not screw him though, he screwed an opportunity to be boxing's level of Tiger Woods or Michael Jordon. Repeatedly.