Hiya,
I think it's a stage that we go through in healing. It is really unfair when there is no redress, no acknowledgment, no authorities know, there is no support and the abuser gets to get away with it Scott free. It's a stage where we say how unfair the whole thing was, and lots of other stuff too probably.
And it IS unfair that they get away with it and never have to stand there and answer to the many things they did and said, one by one, which are true and factual.
For me, I just left that bit unanswered because like you I had to, and I grew other things around it instead. I looked at my coping mechanisms and how easily they cropped up, I looked at my lifestyle, relationships, responses, chips on my shoulder, attitudes, the language I used, whether I was manipulative out of fear of being direct, my career, my music collection - everything.
Now I can look back and see that what I was doing was wriggling free from HER and growing in MYSELF and I slowly left all things to do with the abuse behind me.
So my advice to you OP is to keep on rowing your boat away from the shitty island of abuse and in time you will stop looking back at it all and instead need to look around and forward xxx express how unfair it is that you will never get the answers you deserve and let that energy come out and go away with time.