I don’t really understand what it is you’re after. Do you want a place where people only get positive reception no matter what they say? Maybe that exists in a group therapy session, but I don’t think that’s what you’re asking for. Is it?
Is it about getting down voted? Who cares? You can’t control how other people react to your opinions and you shouldn’t try. Lemmy is diverse and it is federated. Each instance and community has its own rules and culture. If you don’t find any of the communities to your particular liking, you can always start some of your own.