Tangled Up in Blue
Banned
i vote The Cost of Living. most of the episode is about Lwaxana Troi and Worf's kid Alexander ditching everyone to go to a holodeck simulation of a planet of free spirits. it is a nightmarish realm of forced whimsy - Cirque Du Soleil as a bad acid trip. large chunks of time are spent w the two complaining while sitting with freaks in a mud bath. upon arriving there to check it out Worf encounters the below monstrosity, a head painted like a rubix cube, floating in a bubble, and prone to making derpy o-faces.
Yeah. If you take out Code of Honor and Angel One (which are in a class all their own), this is is probably the best answer. There are a lot of dumb episodes of TNG, but most manage to at least be entertaining on some level. This episode isn't even funny on a cheesy level. It's just dull.
The Naked Now is a close second, though. Blegh.