Please continue to post here for support, it seems clear that he bullies you and you struggle to deal with him.
Block his number so you don't need to read his vile rants.
He is bullshitting away let CMS deal with him. Tell CMS he is still abusive towards you and threatening and bullying you so direct pay is going to be appropriate.
You need to sort out the financial settlement, this is separate to CMS so don't let him make out it isn't.
File for divorce and push through with the finances. Find out the legal steps to take to get it pushed through to court. Such as sending one solicitor letter and having it sent signed for delivery so he can't deny receiving it, ensuring it's word that a non-response is acceptance of xyz.
You need to get recommendations if a solicitor that gets good outcomes for people in your situation- financially abusive bastards that refuse to engage.
Do your research, look up on the internet the legal steps and which elements you can do yourself etc.
He's proved that for 6 years he can financially support himself without his share of the marital funds but it needs sorting NOW whilst you still have DC under 18, he is planning to shaft you hence not wanting to divorce yet.