A fickle bunch, but there is a difference between playing well and getting results. It was only up until a fortnight ago Man Utd were in all FIVE competitions and only a shocking refereeing decision over a penalty for the second year running in the FA cup stopped it being an FA Cup final. Man Utd also broke the European record for clean sheets this year, won the World Club Championship at a canter, won the League Cup final with a majority reserve side, are top of the EPL and in the European Cup final.
Of course, I don't expect us to get the credit we deserve, much like last year where we weren't the best team (still Barcelona even though we beat them) nor had the best player (The trophy was still warm from Ronaldo's grasp before people claimed he wasn't the best

).
The mentality of the English fans really does bother me.