So, you're going to continue to not take any responsibility for the fact that you chose to date someone who told you upfront that he couldn't give you the kind of relationship you wanted? Good luck with that attitude.
Polyamory is not just a word. It's an entirely different kind of relational system. Because humans are involved, it doesn't work perfectly all of the time, but it's a lot more honest than the vast majority of people who go from one relationship to another, cheating on each other, and divorcing at a high rate and pretending that's a "proper" way to date and mate.