Yeah I understand your perspective, I can especially see how upsetting it might have been to see that with your circumstance and past experiences. You are allowed to talk about the transmisogyny and sexual trauma you experienced without shame or doubt. But I really do suggest when you're talking about these experiences, to try and not bring that person up as much as you can. Just like how you can see blocked people's posts, they can see yours (and have) so just be careful. About informing them, if they were told multiple times then yeah there's nothing you can really do except put that boundary and blocking them. You did what you could and I'm sorry you were reminded of both horrible experiences.