HW&C i dont really know anymore than i have pieced together from reading G&G, the newspapers, watching TV and my experience of life.
it would seem that he just doesn't fit in with a team environment because i suspect he sees himself as a "special case", a leader, the best player, the star (wants to be the playmker 5/8, captain, goal kicker, hero of the "clutch" moments, spokesperson etc) because he has always been the "best" growing up, unchallenged "boss" of the group. but, now as an adult, amongst peers, he hasn't grown up enough to realise that its not all about him. he may well be a "Know it all" and he may not have learnt the art of just shutting up and not telling everyone how to do it. (i think very much like Danny Cipriani in this regard, remember DC was knocked unconscious at a Wasps training session by Josh Lewsey, because he just wouldn't shut the fuck up).
who really knows, but obviously at both the rebels and by all accounts within the wallabies he has few mates and he sees himself outside the confines of the group because he is "special" and the rules don't apply to him.
as i have said above i really hope he can change because he is gifted athlete, just not a wanted one at the moment.