I mean he has shown up in a decent amount of big matches but ok... People like to be very selective don't they.
If you feel that Pogba's 'big game' performances have been sufficient then fair enough, that's your opinion.
I don't feel that they have though.
Has he been awful in every match that mattered? No.
But has he utterly gone to pieces or disappeared in multiple important games over the last 2 seasons? Yes.
While it's not fair to use his price-tag as a stick to beat him with, it has to be noted that Pogba cost this current United team a lot of money. And for me, the return just hasn't been worth the investment.
I've been following United for a long time (since around 86-87) and my instinct says that Pogba could very likely just not be a fit for United.
I hope that I'm wrong, and I hope he shows up today and performs well.