Just take a break but try it again later, it might get fixed!
I realize lock isn't as much fun with MoP, but if they fix hit it might be more enjoyable again.
I don't believe he said anything directly insulting. You've already stated you are quitting your warlock(f2p all together) now ur back within minutes to play a hunter. Bizr was just pointing out how ironic it sounds to quit playing because of how locks are right now, then you quickly change your mind because you're hunter is fun for you.
It is a bit ironic heh.
As soon as blizz fixes all the 5.2 bugs, I'm sure you'll enjoy your lock again. And you aren't alone, everyone is a little upset in their own way with how 5.2 turned out.