Then why is used so little? I myself used to enjoy it but finding a match took too long so I dropped it.
Well, my theory is that like me, while its enjoyable, the main game calls me more often than CQC to play. I suspect many who enjoy CQC but don't play often feel the same way.
Also part of the problem might be self-reinforcing. Its hard to get a game so people don't play. People don't play because its hard to get a game. This is one of the problems with automated matchmaking. At least you can now start games with just 2 people. Last time i tried got into games quickly.