The concept of portraying evil and then destroying it - I know this is considered mainstream, but I think it is rotten. This idea that whenever something evil happens someone particular can be blamed and punished for it, in life and in politics is hopeless.
When I start creating a villain, I start liking the villain and so the villain is not really evil.
To have a film where there's an evil figure and a good person fights against the evil figure and everything becomes a happy ending, that's one way to make a film. But then that means you have to draw, as an animator, the evil figure. And it's not very pleasant to draw evil figures.