That very succinctly describes why very few new movies are any good. The bad guys are usually just two dimensional monsters.
Elmore Leonard’s bad guys were so well drawn they were almost the good guys.
He was quoted recently as having said about Hollywood’s treatment of his books that in one movie they had people laugh at the bad guys’ comments. He had told them not to do that, because these guys weren’t kidding.
That particular movie did not do well, I believe, not like the ones where nobody laughed (except the audience).