Fucked up population.

Each week that I go to therapy I realize more and more that every single issue and problem that I have has to do with my mom. How she fucked up so badly on parenting me. It's very difficult to just "get over it" since it's literal trauma to my brain. My brain is fucking damaged because of her.
Apparently, I don't have "boundaries" that separate me from other people - in the sense that their behaviors effect me so deeply as if they were my own behaviors. At least that's what my therapist has said. I feel that she is right because I get so riled up and so hurt and upset by other's actions. She told me that I have to grieve that I can't change other people.
I apparently feel so strongly about other's behaviors due to the trauma from my mom. What it comes down to is that I don't want other people to feel the ways that I do. I don't want them to have to heal from their parents fucking them up. I don't want them to feel or to be damaged. And thinking about other people hurting their children or others in a way that harms them makes me very angry and feeling overwhelmed.
When I start to feel angry, overwhelmed, and frustrated I think to myself that I hate being part of this specie, I hate being human, I just feel so disappointed in society. It sort of makes me hate myself simply for being "one of them". That's where the lack of boundaries is. Logically, they are not me and I "shouldn't" feel any sort of negative way about myself because of them, but I feel like I just can't help it. I feel like it's something I don't really choose to feel but I just do.
I don't know how to heal from this. I don't know how to just accept other people. I don't even know if I would want to because I feel that if I were to that I truly would become a monster. Monsters are people that look the other way and allow injustice and harm to happen without doing anything about it. I wish I could somehow be a hero that could help prevent bad things from happening, so that I could help people, so that I could be a part of the greater good. I just wish that humans weren't so fucked up, but the large majority are, and that hurts. It's a fucked up population.