I mentioned this is a thread in General Trek, but it seems best suited here. I did an bit for Whatculture titled
"14 Dumbest Things in Star Trek—The Motion Picture", which is here (link). I already heard a few people suggest other candidates to take the total higher.
Any further suggestions/amendments?
I like bits of the movie for sure but nitpicks being inevitably good clean fun...
The old cliche of "the only ship in range" - yes, Star Trek is about exploring other planets in starships but there's no reason there wouldn't be a bog standard complement of ships by Earth. We're really grateful Kirk was in the neighborhood for this. (the dropped idea of a small ship heading to VGER with battle cruiser
Enterprise being 1.6 hours behind is ludicrous.)
Decker's situation is part of Kirk's rabid obsession, which is one of the movie's central themes.
Can't argue too much with the transporter - it's a grizzly scene and they surely would have done testing on inanimate objects first. Never mind a product can pass testing then you bring it home and a malfunction happens. Stuff happens. That said, VGER still made ity to Earth first and sent out its big zappy balls so it's safe to say time WAS of the essence (which then reduces the issue of Kirk's obsession, but he's also worried about the entire home planet and all). The movie could have been a bit tighter.
The movie, to keep from being rated R, had dialogue about Delta being a planet of sexually advanced people where they all did it constantly. For more on this, please don't bother with the TNG episode "Justice". The Deltans were also empathic and telepathic, which isn't fully fleshed out*, so Ilia was actually reading Kirk's mind and preemptively told him in her own way they weren't going to boink like bunnies. Never mind COVID and other cooties can hopscotch between species. There are reasons why Deltans may not be so welcoming of other species and that's their issue. That and "Non sequitur" - this is a sci-fi movie, not "Days of Our Lives in Space". Sci-fi is going to include verbiage and language that isn't slang contemporary to the time in which it's made. Unless it's Buck Rogers from 1979 or The Orville from 2017...
* sorry for the pun
Yeah, back then the notion of a black hole was a bit woolly. "Blake's 7" got it right (a collapsed star with immense gravity) and it was made during the same time period. For sci-fi, TMP should have known better and use "wormhole". Oh wait, they did... sorta...
Kirk's line "Right, now that we’ve got them exactly where they want us." is the sort of British dark humor that Kerr Avon might say. It does seem out of place for Kirk.
A later scene with Spock discussing what the message was about might have been nice. Was it needed? Spock being unemotional is the antithesis of a human in hysterics (or any 24th century human on the 1701-D.) Uhura should have done this task, I agree. Still, it's nice to see binary on screen. Almost nobody uses binary anymore and most 21st century smartphone users have no clue what it is, unless it resolves around sexual activity.

There's a fun parallel.
Agreed, the probe should and would have copied her uniform too. Roddenberry, sci-fi cliches, and other reasons revealed the revealing scene in the way it had. But Maurice has never seen Deltan males so why would both sexes be the same just because? Or only two sexes? Nature rarely gets complex and convoluted so it's not impossible, but that doesn't make for entertaining or interesting material for a whole episode, much less movie. Never mind humans shave. Why might not Deltans? But I agree, the pumps need to be the same hue as the bathrobe, which is keeping in line with 23rd century (if not 1970s) fashion of miniskirts'n'such of the time.
No argument from me about the serendipity over VGER spitting Spock out... the movie was more about the sheer scale of outer space in a way that Star Wars didn't.
Far be it from me to whine about small universe syndrome...
Oh wow. The rec room set is just a bit 3 story arch, with what
could be a rear screen projection of a corridor whose ceiling rises above the arch - which looks like the one they used for the Borg in "Q WHO". He's got a point about the story being too introspective and it's why doing stories in "real time" instead of "elapsed" are more difficult.
The previous page complained about lack of drama and action. Now we get it and VGER is just a dirty little probe from all the soot caused by some electrical short. Not sure what Maury means by the probe being incapable of removing the soot... or, perhaps the species the probe crashed into and why they didn't clean it up before reprogramming it.
The best was saved for the penultimate slide.
And lastly, the Klingons firing indiscriminately was desperately needed drama. If not really bad drama. He makes a good point.