Paul Pogba might be the most polarizing player we've had at the club.
I'm not sure what it is that elicits such hatred from some people because he's clearly an extremely talented player who - by all accounts- is a consummate teammate and is loved by everyone he plays with.
A lot of the criticism seems inane. When he plays really well, we see a bunch of posts by his detractors criticising him and saying "why don't we see this every match" instead if praising our player for his performance. When he doesn't have his best game, we see vitriolic rancor, as if this man stole someone's money.
United fans have always been hailed for their support of their own, whether it's current or ex players. That's always been what separates this fanbase from most. But recently, that's regressed. Whether that's due to the club's on-the-pitch decline and people's concomitant dismay or negativity, I'm not sure. But this is a genuine world class player and he's the only member of the club who seems to get criticized by a select few, no matter what he does.