Being ignored, muted, or blocked is not censorship. It's other individuals choosing which content they want to see. Censorship is an action that prevents your content from being posted. A relay operator banning your npub is a type of censorship, but only in the way that being kicked out of someone's bar is censorship. You don't have a right to a venue on other people's property. Nostr is censorship resistant because you're free to run your own relay, or publish your content to relays that welcome your content. I think it's important to understand what censorship is, and be careful not to misuse the term because doing so is ultimately a destructive act that mislead.