I know the documentary cannot be taken too much as a guideline but to me he did come over in that as a somewhat immature individual using his boyish charm to try to impress his team mates and manager. His media posts too always seem to illustrate someone who is reluctant to accept the fact he has to grow up.That's a lot of speculation. How on earth do you conclude he thinks that way?
I realise he's still a relatively young man but I just don't see a person willing to devote the time and effort required to make it to the top as a footballer in the same way that Son does for example. He relies more on his personality than his ability to carry him through and now under Jose he's getting found out.
Just my opinion of course but there it is.