I have to agree with Banana Joe here. One of the worst thing about flying career is when you're stuck with someone in the flight deck for 12 hours and all they do is moan, yet they don't do a single thing to change anything.
They hate the airplane, will they consider another fleet? No. They hate the company, will they consider moving somewhere else? No. They hate the profession, will they consider doing something else for a living? Also no.