This is honestly probably the only time I've ever involuntarily cringed, but if I had to pick some Trek moments:
TOS: The Alternative Factor, The ending of Metamorphosis, 90% of S3
TNG: CODE OF HONOR, Rascals, Relics, anbo-jyutsu
DS9: Move Along Home, The Skrrean*, Vic Fontaine**
VOY: I don't even know where to begin
ENT: DECON CHAMBER, Mayweather's whole existence, the augment virus/soong storylines
DIS: A lot of S1 Klingon dialogue, most fight scenes without Michelle Yeoh, 'defcon level', AND HOW ARE MICHAEL'S WIGS SO BAD IN SEASON 2 WHAT THE FUCK
*minus, of course, Andrew Koenig RIP
**JK JK I love Vic
every time a Star Trek writer attempts anything they consider "humorous" or "sexy"
Any time we actually see oo-mox is the perfect example of them trying to do both and failing miserably