You are not the first they've harassed and you won't be the last. Probably the most muted npub on the entire protocol.
Anarchy requires a little trust in your fellow humans. In this case that means trusting that we also know how to block this harasser if they disturb us. I have from back when they went after me long ago.
I know this moment is the toughest to trust others because digits stalker there has broken that social contract with you. You have to remember they are an outlier. Look how many people commented here that they were already blocked.
Remember that the best revenge is a life well lived and life is way better on nostr protocol than any major platform.