It wasn't his skill that the guy applauded, but the determination on display in that match, which people don't care about.
He basically got slated for 6 failed tackles and 7 failed crosses/corners. Most people mocked his failed tackles, only a few might appreciate that as a forward it wasn't his main role to tackle, yet only Tuanzebe had attempted more tackles than him. As the man assigned to take corners, it didn't help him also that the likes of Zlatan, Pogba, Fellaini and Rojo were not in the box.
Offensively, he attempted 6 of our total 10 shots on goal, 2 of them tested Cech, and the other 2 were not far off the post. Martial the striker attempted 2, with one of them from the key pass provided by none other than Rooney the clown himself.
Unlike in many previous games, he had a decent 86% pass accuracy and did not once get dispossessed (Martial dispossessed 5 times, Rashford twice) or have bad touch.
He also got to a good goal scoring position in the box several times, in anticipation of passes or crosses that never came.
People blame him for not passing to Mata in his failed attempt on goal, but Mata was so far behind he couldn't have seen him in the two seconds that he had for the chance.
In a team that were happy to sit back and pass around with two goals down, his failed tackles were for me a consolation to watch, rather than an amusement to be mocked at.