If you ask me, I think people often take it TOO seriously, bashing weapons/servers/classes/maps, getting too deep into the trading business, etc.

I'll admit I'm not a good player, especially by Reddit standards. But it doesn't matter to me if I ever get good enough to play competitive, just as long as it's good, clean fun, and nobody's lobbing stupid insults at one another.
But plenty of people do take it seriously, such as most of the people active on this subreddit. If they enjoy the competitive scene, more power to them.

The big reason you don't find this people "in the wild" is because this is the sort of place where people who are serious about it gather. And you'll get that with any given game: the casual players tend not to be as vocal, nor do they gather in large groups.

EDIT: Okay, what did I say this time that pissed reddit off? <_<