I'm so sorry that you had such an awful childhood, and that it's still making life difficult. I'm sure it's more than just hormones, though they probably add to it. I think our psyches need to deal with these awful things that happened to us as children, and middle age is the time that it can happen, even more so if the memories have been pushed down for many years, or not fully explored. It's a time in life when we consolidate our experiences, and think deeply about life, and try to come to terms with what's happened to us, and who we really are - though I'm obviously not saying everyone does this. I haven't read it, but there's a book called "The Wisdom of Menopause", which kind of sums up what I'm saying. I've had counselling several times, but it's a lifetimes work to overcome terrible childhoods, I still have a long way to go, and I started trying to find ways to cope with mine in my early 30's with therapy and reading. Unfortunately it needs to be explored if we want to help lessen it's effects on us in the here and now and in the future, with an experienced, wise, supportive therapist. I've found older therapists to be more helpful than younger ones. I'm currently regularly talking to a wonderful friend about it who's done a lot of work on herself, and has read a huge amount about it all. Talking to her is actually more helpful than any therapist I've seen. I'll be eternally grateful to her.
I've just joined a brilliant Facebook group called "Childhood Emotional Neglect Survivors Support Group", and I'm finding it incredibly helpful. People on there are so wise, kind and supportive. It's wonderful to be able to chat to others who deal with the same or similar very difficult feelings, including the inner loneliness that has been such a difficult feature of my life. It's emotional loneliness, which is different from being lonely due to not spending much time with other people, though that's equally a problem for me, due to being too tired and unwell with ME to socialise much. 🙁