Been rewatching Deep Space Nine here and there.
SPOILERS
If you want to see just how bad some of the actors truly are on Deep Space Nine, you should definitely check this one out. Not only is it an absolutely horrible Sisko episode about civil rights (what else) but everyone goes without make-up and they do (laughable) New York accents.
Another one is S06E23 'Profit and lace'. It's where they turn Quark into a tranny in order to salvage what's left of the Grand Nagus' authority after he gave females the right to wear clothes. Yes, that's right. Trannies & feminism. :')
(Not to mention parroting all the talking points about getting females into the workforce and doubling the economy, but for some reason they omitted the part where the birth rates would plummet as a consequence. rofl)
S06E24 is also hilariously bad. It's where they decide to send an eighteen-year-old Molly back into the time where she was left stranded for ten years and grew up all alone on an abandoned planet 300 years ago. Apparently, she would be better off there, instead of a Federation clinic, specifically designed to rehabilitate cases like hers. :') :')
Edit:
Season 6 was also the season where they decided to turn Dukat into a cartoon villain and make him the 'nemesis' of Sisko. It resulted in that ridiculous episode where Sisko and Dukat were stranded on a planet and Dukat was talking to himself the whole time. It ended with Sisko ignoring Dukat's mental status and declaring him an 'evil man', after his pride got wounded (once again).
This theme was further explored in S06E17. Where Dukat called up Kira out of nowhere and revealed that he was banging her mother during the occupation, rofl. And then to make it even more preposterous, Kira used the Orb of Time to travel back in time to confirm that her mother was really banging Dukat.
Holy hell I forgot all about that one. I know "O'Brien Must Suffer" is a meme but they really didn't need to do my boy (and his family) so wrong over the years.
Another one with questionable medical ethics was when they wiped Worf's brother's memory. I remember hating it on first watch and being in disbelief that Bashir could get away with that, although I can better appreciate their point of view as I've grown older. The Molly episode didn't get better with time. It comes across even worse now.
Only place I must disagree with you on is the acting chops of Dukat / Marc Alaimo. Sure it was a little hammed up but he did just fine in that episode and any other role he's been in.
The facial prosthetics make him passable when he's playing a Cardassian. Perhaps acting with facial prosthetics on forced him to emote differently in his face. And he could no longer turn off that habit when he was finally acting without a mask on.
The Worf brother thing was also a waste of an episode but it was funny when Sisko complained that even his respect for cultural diversity ended with ritual murder. (Which is strange, because the Feds had Klingons as their major allies.)
DS9 and the Star Trek universe were major proponents of cultural diversity and used to promote mass immigration and multicultural in Western countries.