This character that you describe is fully understandable why you prefer them as they are. They may not represent my own views on relationships, but I could roleplay a Tav that does agree with this approach.

There is just one big caveat. When this character approaches Tav and invites them to participate in their free love and Tav rejects them, he says that he respects their decision and will not pursue it further. Yet, he continues and tries again. So he is dishonest about his intentions and this falls within manipulative and toxic behaviour. Why should he get a free pass to disregard consent because he has a different view on sex and relationships? It doesn't matter if you are poly, mono, gay or straight, when someone expresses that they do not consent, you do not get to keep pressuring them. That's not society being catered to a certain lifestyle, all lifestyles need to respect consent and boundaries.

Surely you don't want rape culture to be associated with the lifestyle, I don't want that. I want a safe and healthy representation.