I have a history of sexyal abuse. Perhaps you find it hard to talk about it too? The Shame and embarrassment. I will say this, whether an innocent child, an innocent teenager it an innocent adult, IT IS NEVER DESERVED. It's not even a thought that should be remotely considered. The person who commited the act us the wrong one. I know how hard that us to even believe. The shame exists from what we are told, whether we are believed if not and/or if any appropriate action is taken against the perpetrator.
At a time where you needed to be validated, believed, protected and taken care if emotionally, physically and psychologically, it did not happen. Thus was not your fault. You did nothing wrong for people to respond in the wats they did. That was their choice, that was entirely to do with them and about them, not you. It's so much easier to point the finger at the innocent, than face yourself or the circumstances.
I'm sorry you weren't believed. I believe you.
All the very best moving forward on your own healing journey where ALL THE CHOUCES are now yours and you do not need to justify nor protect anyone else whatsoever. It's time for YOU and only YOU.