I don't know why he came back to be honest. I think he was hoping for a fairytale return, playing his best football and winning titles every year at United, but he's been wasted for three or so years now, and the mood at the club seems pretty glim, completely different from the national team, that's some insane contrast he's witnessing.
Does he really want to struggle through these times and become a club legend? Is he that kind of guy?
Just hand in the transfer request and go elsewhere, I say.
Pogba... left Manchester United as a promising youngster for nothing, was brought back for a world record fee, did not live up to the high expectations, got into a feud with the manager and rumours has it that he won't stay in the club for long.
Has he turned out to be a disastrous investment for Manchester United or are there any hopes for the future?