Is it normal to be treated this way?

Idk who to ask anymore, my friends say I’m right but how do I know there not just being nice to me because there close to me?

Anyways, decided to post anonymous..
So I’m 19, and most of my life I’ve always felt that the way my family treats me is not normal but this has been happening my ENTIRE life..

Backstory: so the one abusive is my step dad and step sibling, I’ve never met my real father.
So my step dad always abused me as LONG as I can remember. And he treats his blood daughter like she’s god. I would kill for him to say “ im proud of u” “ or “ I believe in you “
No no, I always get “ why don’t u do anything “ and “ you don’t do shit “ when I DO tons of stuff to help. I’ve gotten less and less motivation due to verbally abusive motivation from my step father. Even gone as far as him slapping me and throwing me at walls and even broke my front teeth by smashing my face into my lap top.
I just sit there watching my half sister get a “ good job “ and “ your appreciated “ and even just thanked for doing the tiniest things. While I get verbally abused and physically abused and NEVER seen for what I do.. idk if this is normal IDK if this is how a family is supossed to function. I’ll let you know that im female, and he PHYSICALLY abused me most of my childhood, so bad that when we would argue I would run and hide in my room shaking that I would be okay. my mom rarely ever stood up for me, and my step sister knows that she won’t get in trouble and she rubs everything in my face. Making me feel worthless, helpless, and meaningless… I feel caged like I can’t scream for help. I went to a therapist when I was little and tried to tell her what he has done but they always believe the adult. Makes it WORSE that he’s a respected doctor.
I remember one time that haunts me, my mom tried to stand up for me and got pushed into a chair saying “ no no please “ with my dads fist raised in the air. she’s terrified of him.
I feel so alone.. I always have been.. I turn to friends, who care more about me then anyone ever has..

This has been so bad that I don’t remember a time I wasn’t deeply depressed, I am broken.
And this has been happening for SO LONG I think it’s normal now. But I still get a massive inch that it’s not. I just want him to say a “ sorry “ or a “ good job “ for once.. I want him to love me like the daughter I am. But instead I’m tossed to the curb while my step sister is loved and my mom is to scared to stand up for me anymore. I feel caged, trapped. Like I can’t say anything. the only thing in my home that cares is my cat, and that’s super sad.
My family is in the higher of classes, we own a 1 million dollar log house 3 stories high, with our own river, but money has never made me happy…

Anyway so, basically to sum this up; is this normal, is this not? Idk anymore. as soon as I’m able to afford a apartment that allows pets, I’m gone. I won’t be returning. the only family member I will keep in touch with is my mom.
i will never heal for the abuse I’ve been though. And I have the fake front teeth to prove my pain.

Is this normal? Is this how every family works?