When historical clothing is really wrong/modern. Like if the movie is of the 1950s but the fabrics are stretchy.
When they add the “pull hammer back on gun” sound effect and the character is holding a gun with no hammer (like a Glock). I first noticed this in one of the Fast and Furious movies, and I haven’t been able to watch any of them since.
When they need a bit of blood for a pact or to prove they are human and they USE THEIR HAND - dude. So many ligaments and tendons in there you could accidentally cut not to mention it hurts super hard and you can just use your fleshy forearm instead and still be able to grab things afterwards with less of an issue. I know it’s because it’s easier to hide the fake blood and smear but you can just as easily do that on your forearm.
When a single person is fighting multiple assailants but they still only attack one at a time while the others just stand there trying not to look odd while waiting for their turn.
Ever since I saw a video about it years ago, I’ve found it hard not to notice the overuse of orange and teal in shows/movies that have been color corrected to death. It’s gotten better since the 2000s, but you still have a lot of shows with washed out colors where everyone wears stone variation of blue, black, brown, and orange clothing.
The worst thing is, once you’ve noticed it, it’s so hard to ignore.