There are tons of really terrible MMORPGs out there, but a single one shines out for me, and when I say shine I'm being supremely ironic, because this thing sucks the light out everything it touches. This "game" is Dream World, and is one of the most mindblowingly awful sinks of time and money in the world. To call it is a game is a disgrace to every game in the world, and to call it a MMO is just an outright lie.
This "game" is pretty much compromised of clicking the "explore" button thirty times, then waiting fifteen minutes and doing that again, encouraging people to view their page repeatadly to achieve anything. Player interaction is non existant, with what it calls PvP being fighting another player's character controlled by the computer, and poorly at that. The graphics are terrible and the storyline non-existant. Further more, the game pushes you to pay for "features" at every instance, simply to make the game less painful. Avoid at all costs.
A full review can be found here [http://www.kongregate.com/forums/35/topics/75703?page=1]