Ugh, I think bad actors (or actresses!) completely ruin a movie. When the story goes nowhere, that's one thing. But when the acting is so bad, it's cringe-worthy...it just takes away from the whole experience.
That said: Good actors can elevate mediocre material...although bad actors tend to tear down even the best scripts.
Cara Delevingne She's there in Paper Towns and Suicide Squad and she is such a bad actress. No emotion, just a blank face throughout both the movies and she delivers her dialogue in such a bland manner.
That said: Good actors can elevate mediocre material...although bad actors tend to tear down even the best scripts.