You do know how this works right?

Nostr isn't like Fakebook, Twatter or any other social media platform. If you post a comment everyone can see it. If someone replies and you don't like the comment you can "Mute" the person. That doesn't delete their comment to everyone else, it just means you can't see them. 

Muting is like slowly building your own echochamber more less to protect yourself. 

Good news is that Nostr does provide a delete request but only works for your own comment. The moral of the story is, don't shit on your own lawn and you won't have to clean it up.