What else could I have done?

[antlers]

I've spent the last 3 years holding on to a past that's been a painful reminder of who I was, what I did to others or what others did to me. That past doesn't define me, and it shouldn't ruin my present or my future. I am sick to death of hurting. I was reminded today in a text from my ex MIL that "actually exW is not hurting about yall's marriage anymore. Its over.  She has moved on with her life. I would encourage you to do the same." It stung.
She had sent me some Bible verses earlier today and I responded with "God also said "I hate divorce"..., and Jesus preached against adultery. There was infidelity involved on exW's part. Y'all were lied to just like the kids and I were lied to. That doesn't diminish what I did. I know exW was hurt, and still hurts. I've been apologizing for over 3 years. Maybe that's not enough to address the hurt and the pain that I caused her. But what more could I have done...other than not screw up in the first place? I'd take it all back if I could.  I had true remorse, I apologized, I asked for forgiveness, I did all I could to atone. I went to a Love Without Hurt Bootcamp, I took a Compassionate Parenting course, and I went to counseling. And I changed for the better. I am not the same person I was in that relationship. My behavior truly was reflective of how I felt about myself, instead of how I felt about her. I'm sorry she still hurts...I remember each and every thing that she remembers....and I'm deeply sorry that I hurt her.  I was wrong. Plain and simple. But I did love her. 
And I never cheated. Never. And I know our family was wounded, but it was salvageable. I did not end our family. She did."
My exMIL responded to that with the previous text.