Half the time, Worf states "Enemy decloaking ahead"
before the f/x shot of the Romulans or whoever decloaking. Okay, it's impossible to show the other way around unless they had the camera behind Worf looking at the big viewscreen...
And what happened to the neat f/x shots of a crewmember being really close to the viewscreen that was used a lot in season 1 but not much afterward? Seemed stupid to nix it, unless it was more difficult to do (e.g. hiding the possibility of the blue glow outline around characters used to key in the background in post production...
Data didn't get court-martialed in "The Quality of Life"...
Data did get court-ed in "In Theory"...
"The Inner Light" reveals this big mystery probe, which seeks out an alien thing, rewrites its brain to tell the story of a civilization in 20 minutes but it's not an episode of "The Brady Bunch", then deactivates and doles out a flute after one of the implanted memory people states they're seeking out just one person. If they're wanting to tell the universe about themselves, why deactivate after contacting just one alien critter? On the plus side, unlike the Pioneer Probe, these flute-happy aliens didn't show anatomical features like what Kirk let Khan view while in sickbay... ("Hey aliens, come conquer us, here's what makes us tick, and if you like what you see let us know! Safe word is 'banana'!")
No consistency in the holodeck and how it creates virtual matter... that's easier to roll with, especially if the episode is otherwise strong (e.g. "Elementary, Dear Data").
Data being "Class of '78" doesn't fit based on implied age, coupled with the show taking place ostensibly in the 2
360s. At least TNG got its own legitimate "So when are we taking place in?" like how TOS hadn't made up its mind between 200 and 300 years depending on season 1 episode, only TNG kept the incongruity down to a decade or two instead of a whole honkin' hundred years...
Data having to tell everyone he's an android...
McCoy stating "How do you know that so precisely?" when all Data did was say "137 years precisely" - now, maybe it was McCoy's birthday that day but even then, no mention of precise hours, minutes, seconds, nanoseconds, unless McCoy remembered what mommy or daddy told him in terms of when he was born.
Data and Yar, sitting on what used to be a tree (Tasha's bed, there's just no better way to explain the worst scene in one of the worst-ever episodes, which then needed callbacks - which were a gamble at the time - to retroactively give some dramatic weight what was a truly cringe-worthy moment)...
Any episode where Troi states what everyone in the audience already sees, though the few episodes where her empathic traits are put to good dramatic use (e.g. "Encounter at Farpoint" where she's the only one who'd be able to provide a key plot point believably, "Home Soil" (if I recall rightly), "The Survivors", "The Loss" as a trope inversion, etc) just couldn't be done every week either. So on the plus side, the times when it's used to good dramatic effect makes us long for more than "She's saying the obvious, captain!"
Wesley - in terms of writing the adults as utter nincompoops for the sake of making Wesley look more intelligent. That's a whole new level of teh stupid, but on the plus side anyone age 8 or under wouldn't notice. (Season 2 onward fixes the narrative failures, makes Wesley more rounded and more believable while retaining the higher-IQ and socially awkward qualities, and not at the expense of the adults.)
Dr Crusher bogs off to head up Starfleet Medical... then returns to the ship and not because it gives Q a chance to throw more shade than usual. After the antics in "Ethics", one wonders how she made it to Starfleet Medical to begin with...
...which reminds, season 5 onward ramp up teh stupid with one-dimensional, glib plots that do far more to preach than to tell a genuinely cerebral story. (DS9 onward thankfully didn't continue the trend.)
Even in 1988, the revelation of the critters in "Conspiracy" being pink crawdads that Granny would smoke up after getting a little pot* was laughably bad and not the slightest in terms of being scary, the episode had a good buildup but pretty much shattered at that moment. A follow-up story was to add more to this, but to be fair they changed it so the new big bad would be the cybernetic Borg - so out of an initially stupid inkling came something far more refined and genuinely ominous.
* erm,
