Usage patterns
〈人〉を悪人にするto make someone out to be the bad guy
Everyone ended up making him out to be the villain.
悪人を演じるto play the role of a villain
He's good at playing villains in dramas.
〈人〉を悪人扱いするto treat someone as if they were a villain
He was treated like a villain even though he hadn't done anything.
Expressions
悪人どもwicked people; bad guys; rascals