Not feel so down about myself

I always feel depressed, I’ve had much stress in my life… My dad has been in prison since I was 8 and I doubt he will ever get out. I have only seen him once in the last 7 years… My mom has been through abusive relationships with boyfriends in which I was a partial victim (mentally I guess?)... My sister hates me, a lot of people hate me. I act stupid sometimes… I am kinda lazy… I’m only 15 years old too. I just feel like everything is my fault sometimes.