Nostr will forever fight a losing battle of user acquisition because the other places pull all the tricks to get people to stay as long as possible. Since this user base is virtuous and won’t go down that terrible path, we’ll always struggle against the massively addictive platforms with cemented walled gardens and network effects.
Only new and interesting use cases and approaches might work. Otherwise you’re limited to a tiny drip of disgruntled users who eventually come here.