Besides even the best players have one or two bad seasons.
I know, but answers like this are strange, at least for me.
The best players, who had 10 good seasons behind them can have a bad season.
But Pogba had one (he was even average in the 2nd half of the last Season because of an injury) or 3/4 of good seasons in his whole career.
People made jokes about him prior to 2014.
Then he had 3/4 of good season in 2014/15.
And now, he has a bad season (it is too soon), but you get my point...
Guy played well for a couple of months surrounded by Pirlo and Vidal, in a team which is like 3 times stronger than any other Seria A team.
And now already, we have excuses (not you, a lot of people) for him, how even the best players in the world have poor seasons.
He is not one of the best players.
He is a one season wonder (from a team 3 times stronger than their opponents) for now.
And if other midfielders of Juve are crap, well, now he will play in the same conditions as any other midfielder from Milan, Inter, Roma etc, because they are also playing with a crappy teammates.
If he can shine only surrounded by world class midfielders, then WHY EXACTLY is he better than other midfielders from weaker teams who are as equally as average as him when you put them in an average midfield?