I accused her of not being able to have an adult conversation, that's it. Yet I am still the bad guy.
You are lying to yourself. You were accusing and attacking her for the entire conversation:
You said the following:
"You're going all in with this, aren't you?"
---TRANSLATE: You are a stubborn person who is over-reacting so she can win.
"When will you start thinking about your children instead of just yourself?"
----TRANSLATE: Says the man who didn't pay child support for years.
"You have no idea what you are doing."
----TRANSLATE: You really are stupid.
"Your perceptions are extremely skewed"
----TRANSLATE: You are too dumb or flawed to see reality.
"but as long as they make you feel better about everything you've done."
----TRANSLATE: You are very selfish (says the man who didn't pay child support).
"That's all on you. "
----TRANSLATE: I'm entitled to screw up all I want and you just have to put up with it.
"I wonder what you know about common core and what it will do to (5 yr old)."
----TRANSLATION: You are too stupid to make educational choices for the child you had to provide for all on your own. I know better.
"And regarding our marriage... I know a lot more about things now. I did not "wait until it was too late" because I was going on the information I had at the time."
----TRANSLATION: It is not my fault I was being a jerk because I didn't know better.
"Oh okay. That justifies everything."
----TRANSLATION: I am not listening to or acknowledging your pain or anything you just took the effort to put into that very long text that took a lot of effort. I just want to keep being a jerk.
"Why do you think you felt like we were acquaintances? You never wanted to know why?"
----TRANSLATION: So now it's all your fault. I was acting like a jerk and you should have wanted to know why even though I was not communicating well.
"Here's a hint: men have needs too, and not just sexual. "
----TRANSLATION: Let me educate you, vaguely, on how you were a bad wife.
"But you never cared about my needs "
-----DISRESPECTFUL JUDGEMENT: You don't know what she was thinking. She might have been too hurt by your behavior to want to.
"You were already in an emotional affair"
-----TRANSLATE: I'd rather blame you than listen to you.
"You should have been talking to me"
-----TRANSLATE: Let me educate you some more about how you should have behaved even though I won't acknowledge ANYTHING you are feeling.
"I didn't understand your communication. You also can't make demands of people and expect to get positive results. "
-----TRANSLATE: Since you didn't tell me the way I wanted to hear it I don't have to respond to your communication."
"I don't think you made the right decision, honestly. And not because I was angry or bitter or any of that. What you did was cruel. There is much to the big picture that I have figured out since"
------TRANSLATE: (Again, this follows a long text she must have put in an effort to type - and you completely ignored everything she described about her pain and experience.) It's still all about me. I have really figured out the big picture of how cruel you were. But I'm not angry and bitter; you're just cruel.
"It has to do with my family, particularly my mother. "
----TRANSLATE: It's still not my fault; now it's my mother's fault.
"But what you replied shows me that you still can't converse like an adult "
----TRANSLATE: While I am ignoring all the points of pain you are sharing me so I can blame you, and if that doesn't work, blame my mother, then I'll accuse YOU of not being the adult.
"You chose to end our marriage. Blame is a word you use a lot. I had every reason to be upset.
You. Do. Not. Talk. How many times did I ask you what was wrong? You stared and said nothing.
"You just need to $%&# me more and everything will be fine."
That was your solution to everything. "
-----TRANSLATE: Let me keep educating you on how little responsibility I take and how it's everyone else's fault.
"Actually I agree with you. The single biggest mistake I made was having us staying with my parents. The guy I was then was the result of the dynamic between my mother and I. "
-----TRANSLATE: You still can't respond to her pain. You are only thinking of your own locus. She has shared again, in a VERY long text, her pain. You offer her ZERO empathy to how she felt or struggled.
"How am I supposed to support them AND myself? Live in my truck?"
-----TRANSLATE: Well, how was she supposed to? Move her kids into the car?
"I cannot create money from thin air. "
------So why did you expect her to?
"You have this image of me that has been wrong "
------TRANSLATE: You are too stupid to know how you felt.
"You listen to other people and believe them while never believing a word I say. Like it has always been "
-------Translate: As I have been saying this entire exchange, it's still your fault.
There was literally not a SINGLE response you gave her that was anything other than being the jerk of the day. Do you still think it's her fault (not yours, oh no) for making you the bad guy?
I accused her of not being able to have an adult conversation, that's it. Yet I am still the bad guy.