He was pushed into fame far too young, the pressure is just too much for a young kid of 14-15 in the music industry, with all the crazy fans and manipulative managers. There really should be an age limit of 18.
As for his fans, a lot of them are maniacs sending death threats to anyone he's romantically linked with, following him everywhere, and making his life a living hell. Bieber will most likely detest his fans, he probably blames them for Selena Gomez cheating on him. Turning up two hours late was perhaps his way of getting revenge.
I don't know what the future is going to be like for him. I guess it depends if he's surrounded by people who only care about money, or if he's surrounded by people who care about his mental state. If it's the latter, then they'd surely advise him to retire from music. He's earned enough money to live on for the rest his life, so it's not like he needs the money. His maniac fans would soon move on to something else, and forget Bieber even existed.