Nobody trashes your name with as much ferocity like someone who is afraid you'll tell people the truth. This is why after breakup from a narcissist they launch a campaign of destroying your name and you're confused because you thought the fight was over. But they know they're a fraud and if you speak up you'll destroy their facade. So they smear your name with lies to stop you from exposing them with your truth. Remember they have am advantage in having all the time to fight while you have a life to build and a conscience to behave humanely. The solution is often either to stand firm and let those who know you stick by you and the others to believe what they want to believe or better still, to change community and vacate the narcissist's world. Whatever you have to do, remember you're fighting for your dear life and when it's a matter of life and death, nothing is too much. Migrate to overseas if you need to; rebrand your social media and personal contacts and address; change careers; anything. Only do not wait for the approval of people who only half understand the diabolical nature of the narcissist.