Whoever posted that most definitely does not speak on behalf of the rest of us. The CR is meant to be used however and whenever you would like to use it. And even if you do post an abnormal amount, that’s your business alone. If you feel that you don’t like it here, or that it’s a complete waste of time, you should definitely stop posting. But don’t do it because someone bullied you into leaving. And stam, I don’t think you post as much as people think you do. You just produce a high volume of posts in a small period of time every day, which gives off the impression that you post very frequently.
What I would suggest, though: if you are bored with the CR, instead of posting about how boring it is, search through the old threads to find something interesting to bump or think of a fun topic to start yourself. That’s a lot more productive, and won’t irritate people.