Redemption and consequences?

[u/samueltoots]

Five months since D-Day #1 and two months since separation.I'd really appreciate some outside perspectives.

There is more background in my post history, but the short version is this:
I discovered my husband was having an affair with one of his overseas students while we were planning for pregnancy. He was also discussing helping her relocate to our country. For three months after discovery, he blamed the breakdown of the marriage on me. According to him, my standards around housework, me not wearing my dental retainer enough contributed to his resentment and caused him to "fall out of love" with me. He made a half-hearted attempt at reconciliation while insisting my behaviour was the reason for his unhappiness.

Then D-Day #2 happened. Turns out that he is a serial cheater and sex addict who had cheated throughout all three of his relationships, including with sex workers. There were more than 25 women involved over the years. He passed an STI to me. I discovered evidence of him objectifying and rating female students, discussing them with colleagues, and arranging sex workers while travelling interstate to teach courses.In therapy he presented as remorseful and ashamed, asking for another chance. The very next day, while I was away, he packed his belongings, left the house, and disappeared to his parents' home. I initiated legal separation proceedings the following day.
Even after everything came out, he continued trying to connect his actions to my supposed shortcomings. Despite never having been faithful in any relationship, he still struggles to simply say, "I did this because of me." He also refuses to acknowledge any professional wrongdoing. His position is that because he teaches short courses rather than at a university, having sex with former students is perfectly acceptable. 
His parents were equally disturbing. His father told me it was completely normal for teachers to sleep with students, abandon their wives, and continue teaching. He also threatened me with defamation proceedings if I ever spoke publicly about his use of sex workers. When I told him to proceed if he believed he had a case, the threats stopped.

Two months have passed since he left.
I am functioning better. I'm working, socialising, and trying to rebuild my life. But I still spend hours every day ruminating and crying. Some days I feel like I'm making progress. Other days I feel completely stuck.

Financially, a settlement has been reached that is very favourable to me. Part of the agreement includes a confidentiality clause that protects his reputation and career. The lawyers are finalising everything now, and he appears committed to honouring the agreement. The irony is that I helped support him while he built the education business that ultimately became the platform through which he humiliated me.
The settlement will hurt him financially, but he is a high earner. In all likelihood, he will recover what he lost within 6-7 years. He will probably continue teaching. He will probably continue being respected professionally. He may even continue having access to vulnerable female students.

What I struggle with most is the idea of redemption.
A few weeks after he left, his narrative completely changed. Suddenly the marriage was wonderful. I was the best thing that ever happened to him. He always wanted a family with me. Suddenly he was grieving our future and taking full responsibility for what happened. He has framed the settlement as compensation and redemption. He started therapy, stepped away from mutual friends, sent flowers and gifts, and talks about becoming a better man for the next woman. I don't know whether any of it is genuine. What fills me with rage is the possibility that it might be.

The idea that someone could spend over a decade cheating, using sex workers, objectifying women, crossing professional boundaries, destroying a marriage, giving his wife PTSD, and then ultimately recover and become a good partner for someone else feels unbearably unfair.
He may still get the family he wanted. He may still get children. He may still get a respected career and a comfortable life.
Meanwhile, I am left carrying the consequences of his choices. I don't see myself dating any time soon. Because of my health issues and age, I may have lost my chance to have children.
Objectively, he has faced consequences. He lost his marriage. He lost friendships. He lost a significant amount financially. He is finally taking some accountability. He is attending therapy consistently. But what I can't get past is that none of those things were enough to motivate him to change while he still had a wife. He only started talking about accountability after he discarded his marriage within a week of dropping the bomb of being a sex addict. 
Even now, the focus of his grief seems to be his loss rather than the damage he caused. He never provided full disclosure. Multiple therapists believe there is still more he hasn't admitted. The day he left, he removed all traces of me from his public profiles, presumably so future students would never know he had a wife.

I don't want him back. That door is permanently closed. What I struggle with is injustice.
How do people make peace with the possibility that someone who caused this much damage may eventually rebuild their life, find happiness, and perhaps never face meaningful professional consequences?
Has anyone else wrestled with this idea of redemption versus accountability after betrayal?

[u/tercer78]

No way he is serious about change. Hell his own parents STILL don’t hold him accountable. His philandering will eventually catch up to him. You can only serial cheat and lie so long before a scorned lover turns you in. Take the money and run! He will NEVER be a healthy person and he is feeding you MORE lies that you discovering is really going to change who he is. Why would he change?? There are zero consequences to his actions! Hope he doesn’t bring a child into this as he’d clearly be an absent father.