Well the situation isn't going to change any time soon, so I suggest you change your attitude to it, before you go pop.
An airport is a machine of hundreds of parts all playing their part together, as best they can, and there'll always be good bits and not so good bits.
Sit back, close your eyes and think of five nice things that happened last time you were at MAN: a pretty girl (or guy?) smiled at you; the coffee was particularly nice; it didn't rain; you got away on time; you got straight onto stand etc. etc. There, it's not so bad. Feel better now?