You both could sign join petition and affidavit of a breakout marriage and file in court. It’s cheap and fast. If you wanted to do joint you had to follow procedure and be done. Nothing wrong with involving lawyers but they’ll drag it until cows come home. And that’s what had been happening. What goes in the agreement? Like nothing to put there really. Nothing to draft. Fill out those two forms, both sign and attach copy of marriage certificate. File. Done.

Instructions: Joint petition for divorce (Section 1A) court form | Mass.gov

I like details too but things have to make sense, that’s his lawyer. His lawyer not going to bother writing things how you want them. You aren’t paying him. If you want agreement that covers both of your interests and wordings, his lawyer isn’t the one who’ll bother with it.

This doesn’t need to be that complicated. If you don’t like to deal with legal paperwork, you hire a lawyer and tell them to file. If you wanted to show that you are the one initiating it, joint filing won’t do that. It still won’t show that it was your decision.

If you want all details be correct, they aren’t correct with joint petition. Joint petition states you both don’t want to be married and just both want to get a divorce. It won’t match details of what happened anyways as you said he is begging you not to divorce him. It’s still isn’t accurate attention to details

Accurate attention to details would be you file for divorce.