Well that's got to be a positive thing if he recognises that his behaviour is not right. Perhaps he's not all as bad as I've sort of pictured him. There does seem to be a lot inside him that he doesn't seem to be able to control or vent constructively, and then from the looks of things, he feels guilty after he has finally blown. I wonder if it would be a good thing for the entire family to sit down together if possible and see if there's some system you can ALL take part in to help him overcome it? That way he can get to see that you all really care about making things right and that you're all willing to help support him through it.... I think that would be a bit of a confidence booster for him there as well. The bad behaviour and then the apologies will be knocking him down all the time. He does need help, and I think this might just be his way of asking for it.... it's screwed up, yes, but at least it's there.