If you've seen Breaking Bad (if not, I'm not spoiling much) there is a scene where he tells his wife "I did it all for the family" and she disgustingly turns her head away and says something like "You did it for your own ego. You didn't care about us." It's kind of like that.
Or a problem with winning the rat race is you have to be a rat.
Unhappiness is worse than for naught.