That sort of attitude drives me nuts.
Why should someone leave a company if they aren't happy? Why not stay and try to make things better, rather than just bailing out at the first opportunity.
The standard Pprune call of "why don't you just leave" is purile, facile and totally devoid of any merit as an argument.
Some people care about the company and people they work with and want to make things better. How would leaving achieve that goal?
Please come up with something that moves the debate on rather than just resorting to name calling and other tactics that most adults left in the school yard.