In my opinion, what's worse than people who started in wrath and complain are people who started before wrath and complain. It's like that: Wrath pretty much destroyed the game without the shadow of a doubt. Cataclysm is trying to repair the damage, but it's going to take time. People I knew since classic have gotten total douches in wrath and are now complaining their pants wet about how "hard" everything has become, although they were used to much harder stuff in classic and tbc. That's what a bad game does to people. It makes them bad.
That's why: Wrath-babies suck. It doesn't matter if you started during wrath or earlier. If you picked up the wrath-way of doing things, you are a wrath-baby. Go cry or play counterstrike.