Re: he's not a god and he doesn't want to be.
Actually he is, he does, and he's ranted on that very point in previous episodes. Specifically the Smith ones. Which is probably what makes the Capaldi incarnation so unbelievable. I could sort of buy the whole angry man thing when Eccleston had the role. He had just condemned his race to die to save the universe from the Daleks. But the Doctor just got done undoing that tragic decision before he regenerated. There's no call for being a constantly angry ass in the current incarnation.