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Honey, guess what. You will not be the sweet young dynamic agent of change forever. Time happens. It will creep up on you. So just for a moment, imagine that you actually own some empathy and pretend what it must be like for those "white hairs" to deal with your snotty little self.
There were a dozen ways to deal with your office mate (who has always been nice to you, apparently) that could have been a win/win. You chose otherwise. And most of your statements about the people you now work with indicate a whopping degree of youthful snobbery and disrespect for others.
Time to take a long look at yourself. You won't survive, let alone prosper, if you can't figure out a way to get along with people.
Cary, you blew it on this one.