OP,
I mean this kindly but you are going to have to try and accept that expecting even a modicum of decency in the divorce process with a man who has abused you for years is madness and really delusional.
At his absolute core, he is utter scum.
He can turn it on and off, at will.
Beseeching you last night to backdown, keying your car when you won't.
THAT is who he is.
I wouldn't trust one word nor assurance from him.
If you are silly enough to sign a poor deal for your children, I have absolutely NO DOUBT that he will still fxxk you over at every opportunity with childcare, to make your life as STRESSFUL as he can.
He will want to exert power and pay you back any way he can.
That is what scum does.
Log the car scratch with the police as happening directly AFTER your highly abusive husband tried to bully you into not proceeding with the divorce.
Join the dots and have it logged.
Tell family and friends what has happened.
Of course it was him.
The only position you should be assuming in this divorce, based on experience, is that YOU and YOU alone will be caring for those boys.
Anything else is spectacularly naive, and will bite you in the ass undoubtedly.
He is only going to become uglier, nastier, and more difficult.
He will become single minded in making things difficult for you, because that is what nasty abusive scum does.
Your best chance, and the best chance of your boys having a decent future, is you making every effort to get the best financial settlement so that your boys are taken care of.
I predict within a couple of years as your boys mature, they will pull back from him, as they see clearly, with maturing eyes, what a nasty prick he is.
Go for absolutely every penny and even a hint of abuse ring the police and protect yourself and the boys.
As for your MIL, when she next tries to guilt you, look her straight in the eye and calmly say "YOU HAVE NO IDEA WHAT I HAVE ENDURED OVER THE YEARS"......
No need to elaborate.
Just look her straight in the eye.
Do not attempt to justify yourself or your actions.
Just one line, telling her nothing, but everything, all at the same time.
Keep posting.