It may seem that way coz he made 3 critical ones. 1 for a goal, one on a corner, and a 3rd on Kolarov's deadly bending freekick. Other than that he won 2 Ariel battles against Aguero and no one on the 5th.I think Huth won nearly every header from a corner both in attack and in defence
He got beat on Fernando's free header and was horribly out of position on Aguero's goal.
As much stick as Demi has gotten, it will surprise most that he won the most Ariel battles in actual challenges: 6 of 7. Unfortunately he lost the critical one that led to a goal.
That's perception for you.