Honestly, you are not the only one thinking that. I've seen many complain about Pogba on this site and honestly, I can understand them.
Personally, I think the problem is not in his quality but in his style of play. Pogba isn't a midfielder who like to alway play quickly to break down defense on the counter. Honestly, if you give him a lot of space to see the game and project himself, he can truly shine, put him under pressure and it will be a lot harder for him to show his quality.
I do think however that like a lot of other player who start to the season hasn't been as amazing as usual, we shouldn't be too harsh on him because of lack of resting between game and preparation before of the season.
In my opinion, he doesn't fit the rhythm of the Premier League, he doesn't make sense at the back. He has some control over the ball, but the rate is too slow. For a top midfielders, consistency in the delivery of the ball should be a priority.