I don't think anyone ever has any right to be miffed or angry over losing an Oscar to someone else. The thing is, as cliche as it sounds, it really is an honor to be nominated. If to be one of a tiny, tiny handful of working actors who are recognized in this way isn't enough to keep your ego satisfied, than you've got bigger problems than your empty trophy case.
And no matter how much the press and anyone else builds up someone's Oscar chances and heaps on the praise, it's no one's fault but Eddie Murphy's if he buys into his own hype and gets disappointed. The fact that he threw a temper tantrum is completely on his ungrateful head.
"You can only become truly accomplished at something you love. Don't make money your goal. Instead, pursue the things you love doing, and do them so well that people can't take their eyes off you."
- Maya Angelou