This is the point that I was trying to make about Arsenal, only Wilson puts it in a more measured and convincing fashion:
There are two points here. First of all, by crying wolf so persistently about referees, Wenger invalidates genuine grievances. Against Sunderland two marginal decisions were called wrongly and went against his side; against Barcelona something inexplicable happened that really ought to be examined. And, it might be noted that a linesman incorrectly gave a marginal offside in Arsenal's favor in the first leg against Barcelona, ruling out a Lionel Messi goal: those things happen, and until FIFA finally permits technology, they will continue to happen and managers just have to put up with them.
And the second is that the constant bleating and offering of excuses gives the players a get-out. Wenger is not alone in blaming referees, of course, and if Sir Alex Ferguson gets away with a one-match ban for his attack on Martin Atkinson, who refereed United's game against Chelsea, as was suggested by some media reports, then that is appalling. Ferguson's rants tend to be aimed at generating a siege mentality and/or distracting attention away from his side's failings and it could be argued that their cynical nature makes them morally far more questionable than Wenger's impassioned irritation.
Behind closed doors, though, Ferguson doesn't offer his players a get-out; Fabregas, meanwhile, has spoken of the calmness of the Arsenal dressing-room, describing how nobody ever shouts at anybody and everybody gets on perfectly. That's not a bad thing in and of itself, but the result appears to be that nobody ever takes responsibility. It's always somebody else's fault: the referee, the opponent's tactics, the fact the opposing goalkeeper always has a brilliant game against Arsenal (so buy a good one yourself), bad luck.... Yes, Arsenal has had injuries, but United's injury problems were so bad it fielded seven defenders and Darron Gibson against Arsenal in the FA Cup on Saturday and still won comfortably 2-0.
Maybe I just should have said that Wenger’s post-game outburst reflected a classic instance of displaced anger. Rather than focusing on his team’s shortcomings, he spent his time working up a media firestorm against a bad refereeing decision.