OP I think I am your DP and you are my ex.
i had 20 years of therapy (ongoing) antidepressants, and anger management courses. As my babies became young adults, family life imploded slowly but steadily.
I knew I was “the problem” but could do absolutely nothing to stop my reactions. My self hatred and despair and loneliness increased with every one of my outbursts.
I finally left. My DP and one DC begged me to stay but I could see that I was damaging everyone I loved so I packed a suitcase and left - and not one of us has regretted it.
I finally got an ADHD Diagnosis and everything fell into place. RSD is a real and major part of my symptoms. It isn’t that I will not change, as god knows I tried absolutely everything - but that I cannot.
OP, since I moved out ten or so years ago, everyone is happier and able to show the love and care we feel for each other. I holiday with my “ex” and my DC, sometimes all of us, sometimes just me and him. It’s wonderful.
I celebrate my DC for who they are, I have an incredible relationship with them now - I have owned my shit with them, my immense regret and shame - and to my amazement they say it’s ok and that they love me and that in fact I over remember the bad bits and forget all the good bits, that they are glad I’m their mother. This brings such gratitude in me. I simply do not believe that without the space and “air” of separation, without reducing the opportunities for me to go into RSD around those I love, I would be truly alone - my DC and my ex would have had to push me away.
One interesting thing was my ex has changed so much without the pressure of me - he’s been able to grow himself as a father and man, part of which was being able to reflect on his own part or share in the family dynamics that emerged as our DC grew up. He remains the most important person in my life, we message and meet loads, and all is good.
I remain very prone to RSD despite taking medication. I still have outbursts and meltdowns and frankly wish I’d never been born (not suicidal, just it’s all been such an almighty slog and misery and self hatred),but I did manage, in the end, to do the right thing for my wonderful DC and ex, and for our family.