Is it, though? I mean, don't get me wrong, happiness is very important, but we're talking about literally a billion dollars. You can use that type of money to do a shit ton of things, and virtually guarantee that your children, grandchildren, great-grandchildren etc. live very, very comfortable lives. Personally, given the choice, I'd gladly choose half a decade (or whatever) of absolute misery working for an asshole boss if it will net me a billion dollars in the end. Because for me, my own happiness is not more important than the happiness and comfort of those around me and those who come after me.