No worries about venting. This is a safe place. That's what SR is here for!
My experience is that telling my truth about family secrets in places like here, where people get it, is the first step in healing.
I relate to the feeling that my siblings had/have a very different memory of our childhood experiences. One sibling remembers being beaten, which I have no memory of at all. (Did he get beaten in private? Was I hiding? Was I purposefully not looking? Were the beating before I was born? Is he lying or making it up?)
I know for myself I have many years that are pretty much blank in my memory. I know most people don't remember everything from childhood, but I think that I as an ACOA am missing more than most.
My experience is that SR is a place where I can get my feelings and experiences as an ACOA validated. I find peace, hope, inspiration, and joy here.
Glad you are here and I hope you find peace and comfort here and in the rest of your life.