My first take:
TLDR: If it is an episode that focuses on Alexander or Lwaxana, avoid it if you can. If it features Beverly or Geordi, it's kind of a coinflip.
S1
1. The Naked Now: Not particularly well acted and features Wesley as boy genius in an annoying way. There's a thin line between homage and ripoff.
2. Code of Honor: Although I still consider this a guilty pleasure, and would probably watch this over objectively better episodes, it's racist AF.
3. The Last Outpost: The introduction of the Ferengi was underwhelming
4. Justice: I considered leaving it off the list, but Wesley's "I'm with Starfleet. We don't lie." is too painful for it not be included
5. Angel One: Just kind of embarassing all around
6. Symbiosis: Drugs are bad, m'kay?
7. Skin of Evil: There had to be a better way to get rid of Tasha Yar than evil tar.
S2
8. The Royale: I get that they were trying to have fun, and it is kind of fun, but being stuck in a badly written novel too easily translates to a badly written episode.
9. Manhunt: Lwaxana's annoying as usual, and for it to work, she's got to be oblivious to what a holodeck is
10. Up the Long Ladder: Space. Irish. One where I feel embarassed for the actors when I watch it.
11. Samaritan Snare: It is almost physically painful to watch. The whole Pakled thing got somewhat redeemed by Lower Decks, though.
12. Shades of Gray: Probably on most people's list in the top 10 worst Trek episodes ever.
S3 - I don't know if I think that these episodes are really bad, as such. Just the worst of a pretty good season. If we weren't going with the limitation that each season had to be represented and no season could have more than 7 entries, I don't know if I would list them.
13. Evolution: Just kind of boring. The couple times I've done a rewatch, I usually forget that I've seen this.
14. The Bonding: Ditto
15. The High Ground: A Beverly ep
S4 - Same thing -- I don't dislike these episodes, but they just aren't up to the same standards of the rest of the season.
16. Galaxy's Child: Portraying Geordi as a stalker/loser is not where I want to be
17. Night Terrors - I may rate this lower than it deserves for the bit of Deanna floating in her dreamscape
18. Identity Crisis: Another meh Geordi episode
S5
19. New Ground: Episodes focusing on Alexander are usually earmarked for badness
20. Cost of Living: Featuring Alexander and Lwaxana is a double threat
21: Imaginary Friend: So much is on the shoulders of kid actors for this and they just aren't up to it.
S6
22. Aquiel: Guest-actress was super bad, and again, the episode doesn't make much sense. Why is the chief engineer leading a murder investigation?
23. Birthright I: For being able to do a gazillion computations per second Data is pretty darn slow figuring out his dreaming, and Worf can just pick up and leave and do a solo mission as to a possible Romulan prison camp? Really?
24. Suspicions: Again, the notion that Dr. Crusher is going to be doing the lead on a murder mystery, or that a form of shielding that could withstand direct contact with the sun would be possible to have been stolen is preposterous
25. Descent I and II: Pretty much nothing in this one makes sense if you think about it. How did Lore happen on the Borg? Why would they follow him? Why would he want the Borg followers? Or to bond with Data, who he mostly hated?
S7
26. Interface: Another bad Geordi episode
27. Dark Page: Another Lwaxana episode. The premise that for 30+ years Lwaxana hid that she had had a 6 year old child seems hard to swallow
28. Sub Rosa: Ghost sex.
29. Masks: Just an all-around cringey ep
30. Journey's End: I didn't particularly need to bid Wesley a farewell, and the portrayal of the Native Americans isn't great.
