Where did I say that I don’t welcome criticism?
You should welcome criticism. That's the crucible for improvement. Assume Monero is a complete dead-end, if nothing else, those Monero reply guys helped put pressure on Bitcoiners to bring more privacy solutions to shut them up. Win/win imo.
To your last sentence, Nostr already has a couple Monero integrations:
Discussion
Where did they say you don't?