Yes, in the crucial match against Liverpool, Arsenal ended up drawing, destroying all their title hopes. And there is only one reason for it, Referee again!
It seems the Referee's who manage arsenal games does not have eyes. This one certainly did not, nor did his assistant. All, Liverpool was doing was kicking arsenal players, and Referee allowed it. Walcott was fouled twice right infront of the Assistant referee, and guess what? He did not SEE IT!

It is disappointing, seeing that Liverpool comes and kicks arsenal players, and Referee allows it. There were lots of shouts of penalty, and Referee again did not see it. Also, there was probably career threating tackle of Walcott, and Referee did not even book that player.