I'll go first:
The Voyager two-parter "Year of hell" is considered one of the strongest stories in the series, and I'd presume ranks pretty high in the entire franchise. But it's entirely rubbish, of course, because even across 2×45 minutes it only depicts 257 days.
We were promised a full year of hell, where are the last 108 days (109 in case of a leap year)?! Did they plan a three-parter but cut costs to afford an even tighter catsuit for Jeri Ryan?
I'm outraged by this glaring oversight and can never watch another Trek episode with the same suspension of disbelief, [edited for brevity]
Just kidding of course, loved rewatching the EPs the other day 🙂 What absolutely stick-in-the-mud killjoy kvetching can you all think of to ruin a Trek episode?
Bonus points for being more ridiculous than whatever Youtubers du jour come up with 🤣🖖
"Resolving conflicts that have been brewing all season"? Serialisation is against Roddenberry's intentions!