IMO evil is an immutable, intrinsic moral characteristic which is relentlessly harmful to others without remorse. It defines the soul. While varying degrees of this apply to most bad people, I generally don't think of people as "evil" because they are typically not beyond redemption (i.e. their predisposition is mutable) and there are better ways to descibe them regardless. E.g. X person is racist or Charles Manson is a psychopath.
I also don't call people evil because it can elevate their status. Being evil becomes