He single handedly won against Norwich. He has done his best and scored many vital goals even after all his effort what man utd game a complete disappointment.
Well they won 46 pts in the 28 games he played, and 9 pts in the 7 games he didn't play (7 of those in the first 3 rounds before he arrived). And that is with them dropping points against the worst teams in the league with him in the lineup.
It was a huge mistake to go there. He could have ended it here on a high with a scudetto, then either extend for less money or find a more fitting club.