What's sad is that literally all the big teams struggle with this and there's nothing they can do. And what's even sadder is that most teams, even the rubbish ones, are capable of pulling it off.
Chelsea, Tottenham, Liverpool, Arsenal and even United at times have come unstuck against sides this season to some extent by teams parking the bus.
The legendary Barcelona side of Pep failed in two CL campaigns and both were against sides that parked the bus.
In general the only tactic that works is scoring first and scoring early enough to put doubt into the bus parking side and make them open up a bit. If it drags on at 0-0 for too long (or worse 0-1) then the bus parking team knows what they're doing works and even at 1 down they'll keep it up.
What's really pathetic though is how this is almost exclusively an English thing. Not that others don't do it, but it happens loads over here. What are young English players supposed to learn for these teams playing that way? Is it any surprise that almost every English player not at a top 6 club is not fit for international football?
Also teams don't realise how bad it is long term to park the bus in one off games. By playing your normal game against better side helps you learn a bit about the strengths and deficiencies you have as a team. It provides you with invaluable experience as to how to play at a higher level (like City's first couple CL seasons for example). It provides them with another game to improve themselves and become better equipped with the manager's demands. Sure, you might lose to a team like City playing that way, but as we've seen this season teams are losing to teams like City parking the bus anyway. But playing nice football and losing might be really helpful in that next relegation 6 pointer you have being able to actually play football.
Look at Watford. They've lost this season to us, Chelsea and United, conceding a lot of goals in the process. But in each game they've played nice football and given it a go. And it turned out playing that way helped them beat Arsenal and almost beat Liverpool, which is more than can be said for the bus parkers. And look where they are in the table too.