Not all teammates are consistently awful. Matic had a high the same time Pogba did. Lindelof was one of our most consistent performers over the course of the season. Rashfords peak form coincided with Pogba's too.
Young sure had a shit season throughout. As did Lingard. Most others had hit a purple patch during Xmas all the same as Pogba.
He's not compared against legends. His standalone performances are judged. You don't need to have star players around you to not jog around with your arse sticking out and hog the ball during poor periods of play. When he's great he's great. But it's noway near consistent enough. A dip of a month or even two can be palatable. But being below par for 6 months out of the 9? Feck right off