I've found /r/soccer is pretty low on the "internet culture" stuff. And /r/gamedev, while too small to sustain much interesting discussion, does provide good links.

But yes, any large subreddit on any topic is infected with all the rage comic and meme garbage that Reddit inexplicably loves. You have to figure that the average age must be around 18-20, which becomes very tiresome if you're more than a few years older than that.