@Andy-M I don't think anyone expects Pogba to carry the whole team but i think in a way you've answered your own question... He gets stick because he cost £89m and if i asked a survey of United fans who they would rather keep... POGBA V HERRERA... I reckon it would be pretty split down the middle and the latter cost £65m less!!!
Take the likes of Neymar, Coutinho & Dembele... all cost more than Pogba.. all come under scrutiny simply because they cost so much and haven't always delivered for their current teams.
The reason why Pogba gets the brunt of the frustration is because win or lose he has an 'i don't care' attitude that not all fans like.. not all fans like his social media antics.. not all fans like the way he ruffles feathers... not all fans like the way he reacts to them, to those above him and the way he goes about his day to day business....
Compare him to Phil Jones for example... He's a much better footballer, has a hundred times more quality and is on a different level with the ability he has over Jones... But nobody moans about Phil Jones away from the pitch... and even though he does lack quality sometimes.. he still puts his head in where it hurts... he gets kicked in the face, makes big tackles, throws himself in front of the ball when it matters (and even sometimes when it doesn't)... unfortunately stats don't always tell the whole story when it comes to defensive duties... But i do think most United fans would appreciate 11 Phil Jones over 11 Paul Pogba's because they work hard, put 110% in and away from the game conduct themselves impeccably!!!! Which is why they don't get talked about even though perhaps they are as just to blame for not having the quality???
As for United not having 10 great players???
All i see is league winners, champions league winners, international standard footballers, cup winners, top top top footballers that have won the biggest, best and toughest prizes in the game!!! Don't tell me these are now all bad!!! No more excuses for United or for Pogba, they are all to blame, Pogba simply because he cost the most and is the clubs prized asset and the one seemingly most turbulent (aside Alexis perhaps) is more to blame than anyone else!!!