I'm genuinely sorry that this has been your life up until now, and I'd like to offer genuine hope that it can get better. You're on the right track, seeking support, clarity, and safety.
From your description above, I can sadly say that my childhood was horrifically similar, and even though I escaped into homelessness as a teen (note: I thought I was punk AF and could survive anything, though I very nearly didn't. Even w/o a drug addiction, etc. the experience was close to lethal several times over), it took me until I was in my mid-20s to finally cut them all out of my life.
Fast forward, and I've spent a considerable amount of my career either focusing on outreach for those in need, or somehow involving support for those communities in whatever I was making a living at.
I guess what I'm trying to get at is this: once you're safe and making progress on what you feel is important to your own life, it matters very little indeed what they're doing with theirs. 🖖🏽 Get safe, find your happiness, seek your own ways to make this world better for others like you. ❤️🔥 Only then can you plant those proverbial shade trees.
That's what's called a passel. A soft & cuddly passel o' puss. Yup.