I hate to agree but moaning is a way of life for BA cc, not in a nasty way, many joke they get training in it!
Every flight is too early or too late, too long or too short, too busy or too quiet. Not worth enough money, on the wrong day, to a rubbish hotel etc etc.
They can't help it, bit like I moan about everything else in life, especially after reading the hate mail.
A friend of mine is one of life's happy people, he copes with a life of back pain by saying at least he's not a Rwandan refugee!
It's a cultural thing, very hard to change, especially when having to adapt to the current economical climate.
Any BA crew, go stand by the CRC coffee bar for 10 minutes and see how some of the crew treat the staff, then watch to see how many can be bothered to clear their cups and mess from the tables afterwards.
Go on try it for 10 minutes, you may be surprised.