Courts will make him pay child support and if he makes 5 times more than you it should be substantial.

Domestic abuse shelter should help you with resources for yourself and your children. They can help with divorce proceedings too, filling out the forms etc

Yes it might be useful to analyze if he is narcissist or what not but you can spend your whole life thinking who is narcissist and who isn’t (as it’s a new trend now), all while your life will continue being in shambles and you’ll never move ahead and continue perpetuating misery, I hope you will not take that path in life.

Take action by seeking resources starting with a phone call to a hotline and proceeding to a shelter. You and your children are in danger. Analyzing why he is who he is isn’t going to get you out of danger. You can do it later. We are here for you and if you need resources specific for your state please let us know here or PM me. I locate resources for people all the time as well as volunteer in a shelter

Please put safety first