Being an asshole isn't necessarily 'cool', but it can be satisfying. When I act like an asshole, it's only towards people I really don't like, and then it's not just to be mean but because that person is genuinely a fucking moron and I'm trying to get them to leave me alone.
For example, this girl at varsity described a lecturer as progressive, but when asked what it meant she couldn't give me an answer. Then she continued to yammer on and on, making a bunch of random statements without backing any of them up with a solid argument and proceeded to get offended when I didn't agree. Eventually I lost my temper and told her to shut the fuck up. To which she replied, "You're really rude. Could you do me a favour and be nicer if you don't like what I have to say?" To which I replied "Could you do the world a favour and go take a nap on a speed bump?" That shut her up.
The human appendix. Proof of a higher power. A divine kill switch so to speak.
No one really likes a smartass, but people tend to like a dumbass even less.