My parents hate me

I've recently been struggling with my mental health. And today was the last straw. My parents got divorced when I was 4 months old, and I don't see my dad anymore, because of his ab*sive behaviour. But life with my mum and my grandparents isn't much better. My grandmother (who I call mama) is always getting into arguments with me about pointless things and my pop threatens me and harms me physically when he's upset. Bit my mum is always yelling at me and mentally damaging me 24/7. This afternoon I got off the school bus with exciting news. I got the highest in my class for my religion and music assessments. I told my mum about this and asked if we could go to the tech store so I could get a pop socket (I've been through multiple screen protectors on my phone and I'm trying to find methods to prevent damage) because I knew we were going grocery shopping anyway. I mentioned all the scores I got and reminded her it was my birthday. I felt sure that just this once, she would take 10 minutes out of her day to treat me. But she said no. I told her that every single afternoon I spent hours studying in advance so I could please her and myself, just like she asked. And that it was my birthday and I should at least be able to get something useful which isn't even too pricey, but still she said no. ( something you need to know about me is because of all the trauma I have dealt with in the past, I am extremely emotional and sometimes I have severe anger issues, I have also been diagnosed with generalised anxiety disorder and I'm possibly autistic as well.) I started crying because I felt like she was always getting angry at things I did and also because all my life I've done nothing but try my best to be accepted and treated well. We got to the supermarket and I stayed in the car, still crying, and my mum asked why I was. I decided to be honest and open to her about my feelings and told her that I was extremely upset with the way she was talking and acting towards me. I told her that I just wanted to have one moment of enjoyment on my special day, and that I felt she was being unfair. She got back in the car, started speeding down the highway and continued to scream at me saying that she and my grandparents had treated me with nothing but respect. She continued on to call me a selfish child, and stupid and other things like that. I put one headphones and turned up the volume all the way so I couldn't hear her yelling at me. We got home and I sat in the car with my music on full volume (enough for you by olivia rodrigo) for a solid ten minutes. I was crying my eyes out and felt like I wanted to end it right then and there When my mum came and kicked me out of the car.

If this whole situation sounds stupid, it probably is, and if that's the case sorry for wasting your time. I just need some support and I feel like this is the only safe place I can go.