He strikes me as just as troubled as Harry is but William has got the intelligence to look for a solution instead of just throwing his toys out of the pram.
I disagree. If he were in the same position as Harry he'd be just as ill adjusted.
The difference is that William has Royal advisors making sure he doesn't put a foot wrong (or a serious foot wrong).
Left to his own devices, William would be an entitled man wondering why the world doesn't owe him something.