While he stops Hunter from having any of the women, Sterling is also becoming a "dio del sesso" himself, which was one of Hunter's goals. Even though Hunter's not getting any action, I imagine he will have some sort of last laugh, with the satisfaction that his legacy will live on in a way.
I've made the analogy before that it reminds me of Star Wars, where Sith Lords would train apprentices until those apprentices became strong enough to defeat their masters. The defeated master simultaneously "wins" (because they succeeded in training a strong apprentice) and "loses" (because their apprentice typically kills them).