Looking over the current thread on DS9's worst episodes, I realize how easily they are ignored. They are often forgettable from the start, not really attempting to move the series forward in any way. They tend to be little adventures or small detours for one of the characters.
On the other hand, think that there are a few episodes that attempted something big and fell short. They may not be the worst, but they show unrealized ambition.
The episode that comes to my mind is season two's Sanctuary, the story of the Gamma Quadrant race that fails to find a home on Bajor. The Skreea did not need to be sympathetic; I think that the flaky makeup made them feel "undesirable" and "unclean." Two things didn't work: there's little sense given that settling Bajor is essential for the Skreeans; and all the decisions to rejection their refuge are never depicted. This might have been another good political episode.
On the other hand, think that there are a few episodes that attempted something big and fell short. They may not be the worst, but they show unrealized ambition.
The episode that comes to my mind is season two's Sanctuary, the story of the Gamma Quadrant race that fails to find a home on Bajor. The Skreea did not need to be sympathetic; I think that the flaky makeup made them feel "undesirable" and "unclean." Two things didn't work: there's little sense given that settling Bajor is essential for the Skreeans; and all the decisions to rejection their refuge are never depicted. This might have been another good political episode.