I hear you. It's important to talk about it with a professional. You realize new things about your condition and its cause all of the time. Usually, non-trained people like parents really don't understand despite their good (if that) intentions. (My Mom did not want to hear anyone's problems but her own.)

CPTSD is a difficult condition. From what my new T tells me, it will take a very long time to make progress with it. On a daily basis, I struggle as do we all. My only advice is not to discuss it with anyone who is not sympathetic and empathetic. If your Dad cannot meet those requirements then you are only setting yourself up for disappointment and possible further hurt. Ts are far from perfect but they should at least offer sympathy and empathy. It may not sound like much but, honestly, it is.

We all want a cure. It's disappointing that there are only treatments to possible help deal with the condition. That's the best we can accept. I know that it's very imperfect and not a solution at all. Accept for the moment what helps, however slight, and doesn't hurt / injure further.