girlfriend broke up with me and used my trauma to make fun of me.

I'm a sixteen year old male and I have been with my girlfriend for two months now. Recently, she's been very avoidant rude to me. I don't ask her about it because I am bad with words, so I just try to give her space for a little while. She texts me to come over yesterday and basically yells at me. She had discovered "rad-feminism" and decided that all men are pigs and I don't deserve her. I didn't want to argue about it, I hate being yelled at so I was in tears already and then she said "You know, when you told me that whole story about you getting r*ped by [family member], I should have known you enjoyed it." Then proceeded to tell me she was seeing a girl on the side for a week, and kicked me out of her house. I sat on the curb outside in tears. She can break up with me, she can hate me, she can have whatever political belief she wants. But she brought up my trauma. The trauma I had trusted her with, that she had stroked my hair as I cried into her arms as I told her about it, and she said she would never let that happen to me again. I hate being a guy. I feel like no one will ever take my trauma seriously just because of my gender. this isn't the first time people have joked about/accused me of "enjoying" it, this just hurt so badly because I thought she really cared.. Is it my fault for letting her walk all over me? My fault for letting someone abuse me in that way and not tell anyone for years?