I'm sorry to hear about your experience. Well done for trying to move on and put this relationship behind you, that's a noble first step and shows maturity and a propensity for personal growth.
I know that everybody's different but honestly for me, narcissistic tendencies, cheating, and making you feel sad are three factors that I would consider red flags, in addition to the fact that he's had children with two other women and doesn't appear to want to be in either of these children's lives. He also appears to be contradicting himself with what he says. You deserve somebody who is going to be able to give you their love, loyalty, affection, honesty, and make you feel happy.
If having children is on your radar in future, you also deserve somebody who will be able to raise these children well, somebody who is willing to invest in their lives. It doesn't sound like this ex would be able to do so, from what you've described.
If you feel comfortable, you can always reach out to the other women and have a chat, or air your greivances together. Who knows, you may even make a few new friends out of this situation. If you don't feel comfortable, or they aren't responsive to you reaching out, that's perfectly fine too.
I hope this advice somewhat helps you out, and please feel free to keep chatting to us if you would like.
All the best, SB