It can be hard to let go - but maybe think about it like you are focusing on what you actually have control over to help your children grow as best you can. In fact by focusing on it and discussing it with him you may just make things worse accidentally!! Kids pick up on things and the last thing you want is for them to think you are constantly criticising him. That will just end up affecting your relationship with them.

Like everyone he is probably doing the best that he knows how with the knowledge he has - and as you are not together anymore its really his own business how he chooses to have a relationship with them or not.

Hard to watch though - so try and find a way to reframe it for yourself.... Or accept that it makes you feel uncomfortable and make a conscious choice to live your own life and brung them up according to your values when you have them. X