Why is Reggie Bush considered a Draft Bust?

Most people say that because he has never had consecutive great games. Sure he may get a clutch touchdown one game, but then fall short the next game. He was supposed to be an everyday back like Chris Johnson, but he has developed to be more like a gadget player; used occasionally and sometimes dynamite. In short, he'll never make it as an everyday starting running back in the NFL, that's why he's considered a bust.