It looks like you're new here. If you want to get involved, click one of these buttons!
From the moment MMORPG's where invented the community has been plagued with companies that released unfinished products on the hapless and undeserving public.
The all time worst offender is Cornered Rat (poetic) who gave us WW II online. You couldnt even log into the game, they where completely unprepared for release. It was months before the game reached acceptable parameters.
The second all- time worst was FUN.COM who gave us Anarchy online. Crashes, rubberbanding, insane memory leaks, it was all there and then some, i see no reason to dwell on it.... Except that they are releasing this game as well.
Edit: Just for info, the smoothest release was by Mythic - Dark Age of Camelot, was stable and playable. Mythic has taken over the Warhammer license recently, a future replacement for the now aged DAOC.