Right you are---I seriously doubt that most "evil doers" think of themselves as such; even a monster like Hitler considered his twisted ideas to be in the interest of what he thought a "good" outcome. It's only cartoon villains that identify themselves as such; the rest are blind, mistaken, misguided, deluded, sick---even, occasionally, simply gormless.

Another thing I like about GC Scott's Scrooge is the sense of vulnerable human-ness you get from him; although he's not big on empathy for others, his dread of being left alone by the Ghost in a strange place at night is palpable & affecting---here he is, an old man, abandoned outdoors in his dressing gown & carpet slippers, and that frightens him.

He's also not without a sense of humour, and even when he's at his most miserable & nasty, you can see what there might have been to like about him once. Of course, that's what a really good actor can do with a role: inhabit it, make it real, give it flesh & a soul.

"Giving to airy nothing a local habitation and a name".