AITA for choosing my dad over my mom?

So before I start English isn’t my first or second language so I apologize for any mistakes.

I, 15f have been living with my mom ever since she and my dad divorced, which was I think 7 or 8 years ago, and for some background story me and my mom never really got along, she only wanted two kids (brother1 is now 20 and the other is now 18) and has voiced so a lot, we would get into arguments about the smallest things, she would also voice how she never wanted me and wished she never had me, how much she hated me, there was also emotional and physical abuse when I was younger, thankfully my brain has blocked out most memories but I still remember a lot, one being her getting angry at me for wanting to go to my aunt, telling my brother to drag me home and then tying me in the dark basement while telling me how ghosts were gonna haunt me, I remember crying and begging and screaming for her to get me out but she only did so after my grandma and aunt, dads mom and his sister, came after hearing my screams. That is only a bit of it but the physical and emotional abuse and the things she said to me had led me to hate myself a lot. 1 year ago my dad has voiced that he wanted me and my brothers to live with him instead and we all agreed, but at night my mom came to my room and began crying telling me how I was her only girl and that he was going to make me a slave and how she was the way she was cause she hated him. Guilt ate at me and when my dad came with the papers I said I didn’t want to go, my two brothers went and lived with him and I stayed at my mom. Big mistake. The arguments came back and everything went back to how it was and my mental health was out of the window I started failing school and had to go to court for absent and all, when I saw this I began talking to my father about finally moving in with him and he agreed pretty quickly, when I first told my mom she again got angry and told me to go live with him for a month and if I didn’t go back she’d sign me over, I did, I packed my things and told my dad to pick me up, 2 weeks after she began sending me a lot of messages saying how she wanted to be my best friend and how much she loves me and wanted me to go back and just messages upon messages and I began feeling awful. But something in between happened that made me immediately want to stay with my dad it involved my brother and how my mum was still allowing it and defending her favorite boy. But my brother texted me saying she’s going back to our home country and that she had wanted me to stay with her till then and that I broke her heart and that I’m an ass for leaving. so Reddit AITA? Ask for any more information.