In my opinion:
He is not mentally tough enough. You either are or you are not and he is not.
He drops his head when things get tough.
And I question his commitment and loyalty.
These are mental and not physical limitations.
I much prefer a player like Frank Lampard as an example where you pretty much know what performance you are going to get.
Unfortunately with Pogba that is rarely the case.
I agree with you sir.
I have several issues with him which make me question his skill and character.
He drops his head and disappears when his intentions don't come off. We see him wildly gesticulate at himself, the narcissist that he is, and then quickly disappear into a self inflicted sulk, which then carries on for several games. We often see performances when he literally 'cant be arsed' as though the club's issues and the opposition team is not worthy of a player of his status. He can't sustain a body of work beyond a couple of games.
Add that to his inability to play across the midfield; his fanboys tell us that to see his genius, he has to play left of a midfield 3 with XY player supporting behind, alongside and in front. And when that specific and complex algorithm of circumstances can't be met, we are told he has to be allowed a free pass, that we are lucky to have him. Posters used to mock Gerrard for his tendency to try stupid 'hollywood passes', and yet when Pogba's gets his 1 in 10 attempt right, it's propagated as genius across social media. Paul Pogba really is the ultimate millennial YouTube highlights player.
And that's before his 'virus' personality: he took the club for a free ride on his journey towards La Liga, doesn't want to be here at all, and has only quietened down after Madrid informed his agent they didn't want him this summer.
All of this has been pointed out ad nauseam by media pundits, fans and opposition supporters. But I'm sure his cult fans will offer excuses for all the points I made above, probably via a youtube highlights VDO.