I have to agree Manchester Ryanair Terminal 3 the last few trips has been awful with people just milling around or crashing out everywhere just very busy and hard to get way from the noise. One of the trips we from Manchester mid afternoon and the whole terminal was dirty with litter everywhere the only place for normal food that was open was the pub and they stopped serving it mid afternoon and then there were horrifically long 40 minute queues for the Costa. There just seemed to be a lack of staff!You've clearly not flown out of Manchester recently!
I think there are more seats available upstairs near the lounge now and the last time we went the Italian cafe was open but you are still in a busy open plan bit of the terminal. Still it is no where near the worst airports have flown from.