To be honest, I enjoyed the show except for the very end. Perhaps if they had ended it differently, I would rate it higher. But it would also be no different from other shows and be easy to forget. I can see the writer's dilemma.

Nonetheless, I've rated it as a work of fiction. I enjoyed the acting and the story telling. I do understand that such lifestyles work for some people. Just like polygyny, polyandry exists. Men bragging about threesomes gets brushed away as normal/exciting. But women having several partners or partners simultaneousy is viewed as immoral or shameful. Such is the reality of most patriarchal societies that are especially worse in the continent of Asia.

If those involved are in consenting relationships, should we be offended is what it ultimately comes down to. It is possible to have your own set of beliefs without imposing it on others. In order words, live and let live.