That's a shame, but if he can't hack it then so long.
Perhaps he is just far used to living in his own little world by his own rules that giving up that control and freedom for BB was too much of a shock.
This is probably why civilian BB will never end. Celebs can't be trusted and aren't willing to take too much crap from BB. You get fame-hungry wannabes in both but the ones in the celeb version already get their money from somewhere else, while the civilians are more willing to fall into line.
Plus, the 'celebs' that are actually willing to do the show will probably dry up eventually.