Truenamer
The Truenamer, from the Tome of Magic, is possibly one of the worst classes ever printed. Truenamers use a casting system that's just as horrible as they are. Having to constantly spend resources just to have a reliable chance of using your utterances successfully, coupled with the utterances being usually just bad versions of other spells that you could get at a lower level, is not exactly something that makes you excited to try playing a truenamer. They start ok, then get worse as their utterances are still stuck copying wind wall and other lower levels spell and then they get a pretty much at-will Gate at level 19. The utterances often include lots of spelling errors and other omissions that make them completely different from what they were intended to do. In short, their editing and playtesting were non-existent and it shows.