oh, yeah! anyone who thinks women are "nicer" than guys is living in a dream-world!!!
but, being female with a career is a catch-22.
when you act nice, invariably you get used and screwed. so you are FORCED to act tough. and while I personally try not to be horrible (i really try NOT to bully), you are still forced to be unpleasant just out of self-defense.
the best and possibly only thing one can do is be VERY picky about who and where one works for. and i try hard to be very discriminating. which is one of the reasons I don't work as often as I really need to.