What is this based on? It's all over the place here but i can't think of something to support it.
I will not speak for others, I will say why I consider him as a diva:
-- there were mentions on Juve's forums that he often acts like a dick on the field
-- when Juve is losing or when Pogba is not playing good, he tends to play more and more selfish and to try dumber and dumber things (like ranged drives from virtually any position, Adama's style of dribbling through 48 defenders and similar)
-- Juve fans don't like some of his interviews
-- in the first part of the season, when they were losing and when he played like a crap, he was often fighting with his teammates on the field with stupid gestures and similar (like: I am always right, give the ball to me, I never make mistakes etc aka CR7 style)
-- there were rumours that he isn't too popular among teammates
-- for the end, we have a nice 100M transfer fee, his insane wage demands, and on top of all, we would need to pay additional fee to his agent
If some of Pogba's lovers jump and say: he didn't do some of the things you mentioned above, or Suarez or Neymar do the same, I am not planning to enter into debates.
If someone loves him, fine.
If someone hates him, fine.
These are personally my reasons why I don't like his (diva) personality.