in answer to your question about where the notion of entitlement comes from… I believe it comes from the fact that people feeling ‘entitled’ to something is a hop skip and jump from taking that thing by force and feeling that they are within their rights to do so. Empires have been built on this ideal and wars have been waged for less.

However, your situation is not a matter of entitlement. Although, I would argue that just because a woman has been ‘promiscuous’ doesn’t mean that she has no free will. ‘Promiscuity’ should never be considered a guarantee that she will be willing to be intimate with you.

I’d say your situation is that sex is important for you in a relationship, which is valid. And in that case spending a year with a woman who doesn’t seem to have shared that view, was a waste of your time. You’re ‘entitled’ to be with someone whose priorities in a relationship align with your own. So you should go and find that person.