These strong feelings remind us to pay attention to an existing problem. So ya, feeling ashamed is definitely not a good feeling and you now have enough information to cut ties completely. You deserve better and reacting to his disrespect is human nature. Sure, you could have quietly slipped away. Now you know what you can do the next time some guy gives you a red flag. We don't need to invest any time AT ALL on their baggage. That's their job and we owe it to ourselves to remember that.