Dave Mustaine syndrome?
Dunno, but watching the film, I couldn't help but think of Dave Mustaine, of Metallica and Megadeth fame. He has a similar story, only the band he made to compete with his old bandmates was considerably better than the one in this movie. Good movie, though.
Oh, and Dave was fired because he was an obnoxious and destructive drunkard, unlike Dwight's character in this movie.