Sorry for presuming so much, JP, but I would like to rephrase one of your statements. You wrote: "Almost every issue I have in my life (apart from the toxic birth family one) seems to stem from my desperate need to control my environment and those around me."
Imho, I think it is backwards and should be: My desperate need to control my environment and those around me causes every issue I have in my life because of my toxic birth family.
I am a (former) Stately Homes poster, and can recommend that thread to you to help unravel the damage your family of origin did to you. Please seek counseling for yourself from a psychologist that specializes in family dysfunction and the lasting effects on adult children from such an upbringing. Books by John Bradshaw can also offer perspective, and help to validate yourself (there are several books, so read throuh the summaries to pick the appropriate one/s).
The controlling, micro-managing, mother superior person in my life was my sister. I have had to cut contact with her because she continued the family roles of keeping me subordinate, invisible, which was very damaging to my self esteem and ultimately my general mental health (depression/dysthemia). I was 46 when I got to my enough is enough moment, with no sincere apologies or self awareness (responsibility for her actions) on her part. She has said "can't we get past this?", but she will never change as two different counsellors and the Stately Homes support group have advised, so it has to be a "no".
It sounds like you do have self awareness, which , if I may say, is a seed of hope for you to be able to change and your relationship with your dh to survive.