I was petrified when I went to court, he had his lawyer and parents and I was on my own. I had written and submitted a victim impact statement but I felt the judge needed to see a face not just a name on a piece of paper. When his lawyer tried to spin things trying to paint me as the perpetrator I stood up and called him out on his lies (judge warned me to keep quiet and that any further outbursts would result in my removal). I told the truth and stood up to a bully and I am so glad I did because it was important to me to stand up to him and for him to see me standing up to him (him being handcuffs helped).
I was in a similar situation to you in that ex tried to strangle me in front of DD and was arrested and eventually Inprisoned for two years. I had his mother in my kitchen sobbing and telling me how she hoped that her husband was still alive when her son was released and I really should think of my daughter before sending her father to prison (she was smart but not toxic enough to be more direct).
My family are overseas and I am very private so I told very few people, I was embarrassed. On a subconscious level I thought, wrongly, that on some small level I must have contributed to his treatment of me. Not that I sung it from the rooftops but there were people I needed to tell. DD needed support so her pre-school needed to know and I had talk to various agencies to secure phycological and financial support for us. With every person I told I realised, in part from their reactions, that I had nothing to be embarrassed about after all I did nothing wrong. Yes, I got some pitying looks but the overwhelming response was of shock and support.
I had, and nearly three years later still have the support of a lawyer and a therapist for me and a Phycologist for DD. These three people really made the difference in the beginning as they helped me survive. DD and I have safe places to tell our stories and to be heard. There were times when my brain completely scrambled, despite knowing deep down the right things to do, my head was in chaos. My therapist provides a place for me to unscramble my brain (in the beginning I was miffed that she wasn't giving more direction but now realise that in my case I had the answers I just needed space and time).
I didn't and don't want to be identified as a victim but he did try to kill me in front of DD (he was convicted of attempted manslaughter) and it was important that It was acknowledged by me as well as others.
My daughter saved me, I
might have tried to retract my statement but because I was so angry at Ex for making her witness the attack I let the police get on with it. When I gave my statement to the police they revealed some of the lies that Ex had said in his statement and I knew then for the truth to be known that I had to tell it.
What your Ex did was terrible and what you are doing is simply telling the truth. You are not being vindictive, petty or vengeful you are simply telling the truth. What your Ex did was terrible and a dysfunctional upbringing doesn't excuse him. He is an adult and any maternal feelings that you had or still have for him will only impede your ability to detach from his abuse. If your Ex has any chance of being a better person then he needs to acknowledge what he did, all if it and you can't help him do it.
Even after all the shit, I don't hate Ex but I had to choose and I chose the safety and security of DD and her mother over any maternal instincts i had towards a grown man.
The selfishness and sense of entitlement of your Ex was not of your creation and is not in your power to control or cure.
Disengage from this toxic man and his toxic family, that doesn't mean that you can't support contact between your children and their father in the future but he has a personality that needs very strong boundaries and someone strong to enforce them.
Even after his stint in prison Ex still sees himself as the victim, god only knows what he would have been like had the criminal justice system bought into his delusion.
You and your kids have suffered a terrible trauma and you all need support.
It took me a long time to realise that Ex had serious issues and his behaviour had nothing to do with me. He was and is a man that doesn't take responsibility for his actions and because of proximity I was a convenient person to blame for his inadequacies.