Resentment and Divorce - Need help!

Hi all - im a male/44 - possible ADHD 17 years been married to a female/44 with diagnosis for ADHD.  This weekend she told me she wants a divorce and i am in crises and need help.

We have always had a fiery relationship, much of this was to do with my own unresolved trauma from childhood things and possible Autism and ADHD. I was extremely selfish as a young man and really treated her badly, not actual abuse but definelty significiant unkindness. 

Over the years we have had numerous blow out arguments - ones where rage is so powerful that you cant even breath.  She has left me twice over the years but then come back

We then produced a beautiful daughter 7 years ago.

The last time she left - i realized that much of my own issues were due to my trauma so i resolved to tackle this through professional therapy.  I have been doing this for around 18 months now.  I have made tremendous strides, i have become kind, attentive, concentrated on making connection and the last six months have been amazing, on one instance even leading to initiation of intimacy from her (never happened in previous years).  The rage arguments have larley ceased (one in last 12 months) i am better both mentally/ health wise and have developed a growth mindset.

I love my family intensely and don't want to lose them.

In the last 3 months i started to research the issues that ADHD had on adults.  However work got in the way and a period of heavy work travel meant i only started.

Then this weekend she sent me an email listing that she wanted a divorce, i was floored - especially after all the work and effort.

It was very matter of fact, she had a call with a solicitor and had been talking to friends and had written teh email some weeks prior.  The only section where she gave a reason is here:

"Just do not love you in the way you deserve to be loved. You are perfect for someone else, you have a lot to offer and deserve to be loved and treated well, but I’m not that person, not anymore. 

The next thing for you should be real and full of love, respect and mutual appreciation, something I can no longer offer you. I don’t want to be in this relationship anymore. 
I want you to be happy, but it’s not with me, I am confident after the initial shock that you will move on and find someone to make you smile again."

She suspected i would be angry with her (i am not) but then closed the email.

We then had a talk a couple of days ago about it.  I don't want to break up the family and explained the impact on our daughter and fiances, i explained that i think that a MOST of our previous argument history was due to un diagnosed and untreated ADHD.

Now the part of significant interest ot me is this.  She admits she holds resentment to me for all the things done to her over the early period in our lives.  She is right and i was horrible - 2020 being the last of this.  When i explained that this was historic she will say that to her it feels like it happened yesterday.  She also by her own admission has a tendency to ignore all the good that i do and focus on the bad. 

From what i have researched,  getting therapy and medication for ADHD can help with this - it will allow her to hopefully see the real me and try to resolve some of her resentment and trauma.  She suffers from noise sensitivity and distraction too.  

I have my part to play in this too, trauma nad my own adhd need help - but i think i am more dominant Autusim than ADHD and need another 12 months i think.

I really feel like through help she resolve the resentment but for the time being she is adamant on divorcing me.  She has moved into my dauhgters bedroom and we are still mostly a family - but it has only been 6 days.  She hasnt filed for divorce yet but wants to soon.

I feel like on previous seperations, they were a cry for help., this time feels different.

Would anybody have any advice for me please - i am desperate.