I think the problem is not if he has twitter or instagram, the problem is that he seem to be more eager to show his trade in the social medias than in the actual game.
He is always worried to post things on his media and showoff whatever he is doing, instead of focusing on the game. The pogba that performed in our shirt was way more level heaDed, or at least more controlled. Now he is a grown up, and a VERY expensive one. Do you remember his attitude in his last year here? Yeh the midfield was butchered but the guy was having a meltdown everygame. He showed a lot of nonchalant attitude in ManU too.
But i agree with you that i prefer 1000 times a pogba in our team instead of matuTree and kedira. Is not even a comparison.