I'm not sure why you guys are castigating Mourinho.
Mourinho knew his team cannot beat Man Utd, by "playing football". We are possession based team, so we will dominate and create more chances. Mourinho knew this. So, he looked at Man City, LFC and Spurs and how they lost to us. Then he looked at Southampton and also Villa (when we drew against 10 men) and thought...to beat Man Utd we need to park the bus. So, thats what he did.
At present, the only way to beat Man Utd is to park the bus and hit us on the counter. If you try and "play football" against us, you are very likely to lose. This is why I believed that the Man City and Arsenal (see not below) games are 3 point easy wins for us, because they wont park the bus. Chelsea was the only game I feared because of the Mourinho factor.
Note: I know that some people will say that Arsenal beat us in the FA Cup game, but that was because Valencia (was it?) provided an assist to Wellbeck. And Di Maria got himself red carded very cheaply. This is unlikely to happen again. Arsenal really did get lucky on that occasion.
Now the question is, that if all teams realise that parking the bus and hitting us on the counter is the best way to play us, how do we get around this? My belief is that if we have a top class striker, then even if a team parks the bus, we will still score. RVP in top form. Or a player like RV Nistlerooy, would definitely score 20+ goals/season for us, against the "park the bus" tactic. Our problem right now is that Rooney is our best striker and he was played in midfield today. And Falcao is like a new born calf who can barely stand straight without going to ground. If we get a top striker in the Summer, then I am confident we will be favourites for the league title...but we desperately need to get shot of the (4-goal-a-season) Falcao and possibly RVP.