The first post depressed me more than I can say - not because I think it's the usual whinge but because it seems to be the norm. What a tragedy that the best job in the world has been so eroded.
I would advise your friend to make best speed to leave. It is so important to leave before you become one of the sad, moaners who whinge endlessly but don't have the balls to do something about it and leave.
I left as a junior officer and have seen the change in demeanour in mates as they left one by one. Suddenly the shoulders relax, the frowns disappear and life takes on a new look. Don't get me wrong, for the blokes who stay and enjoy it - brilliant! They've maybe just got skills that I don't have.
The key point for me is that you say your friend has a young family. Whatever kind of civvy job one gets, from Longhaul main-carrier to shorthaul lo cost, your family life will definitely improve.