Our trauma stops us from thinking about doing things like recording them to expose their evil deeds later. I went through the same thing, but don't be hard on yourself. Give yourself some grace after what you've been through.

Narcissists try to drive you crazy so that they can run around town blaming you for the abuse they have been dishing out.

The trick is to seem perfectly rational when these same people turn up to ask you about it. Because then they switch their gaze back to the narcissist immediately exposing them.