Bless your true mom! She obviously knew what you'd been through to keep reaching out no matter what. Have you ever asked her why she did so even when you made things hard for her?
I touched on these thoughts a little myself a while back in this post: https://steemit.com/familyprotection/@life-relearnt/why-the-cps-needs-to-be-questioned
Obviously there is a need for children to be helped, but a balance is needed to stop things going the wrong way. The whole system is problematic. In a balanced court and investigative system the answer for you would obviously for your father to have custody.
I do think that in smaller communities we have better tools to deal with things like this, because we know each other well enough to make the right decisions. When we no longer all know each other then we try to put systems in place to sort these matters out and invariably they fail, because no one situation is the same. There is no black and white and it's too time consuming to make the effort to find out every family's personal situation, so they throw money at it and take the easiest route.
I haven't. I know why. We bonded while I was still cute and adorable, and coupled with her kind heart she never pushed me away. She has spent her life devoted to helping others. The charity work I mentioned she did that won her woman of the year was all activity she did after putting in her full shift on a manufacturing line. Even now, in her 70's she spends much of her time devoted to charity. She is unlike anyone else I have ever known.
She sounds like one in a million and just what you needed to survive your birth mother.
Yes, she was and continues to be a blessing.