Am I the asshole?

Over the past few years, I've distanced myself from certain family members and recently that included my sisters, mother, and a cousin. The recent ones I cut off are complaining to those I still talk to, insisting I've gone too far. My mother, in particular, has consistently favored my siblings over me, from education support to to the most basic of things, often putting me down in comparison. like, for example, somebody says her daughters can cook she would say yes, that’s true, but my middle sister is the better one she’s just afraid of fire the youngest one is trying her best, and then she’ll pretend like I don’t exist as a part of it, another example of my mom‘s BS I got my car that I saved my money for and bought because she wasn’t gonna help me with school, I said I’m gonna get rid of the car and use that money to pay for school. She said Hell no I’m like OK then I said, what am I supposed to do? You won’t put me on your insurance I can’t afford my own insurance and I need to pay for school she would not allow me to sell the car. She made sure the car wasn’t even in my name but my sister bought her car the car is in my sister‘s name and she even added my sister on her car insurance. Health insurance my brother was on it till he got too old. My two sisters are on it even though the middle sister is about to get married and guess who was never allowed on it me. Despite all of that I still made efforts to maintain a relationship. The thing with my sisters now is the middle sister is a shitter. She would go get information from the younger sister about the dumb shit that she did then when the little sister pisses her off, she goes tell our mother and then I somehow gets dragged into the middle of it, and the little sister would start disrespecting me and cursing me out and rather than my mother saying that’s your older sister. I am being told that I need to go apologize to my younger sister the fuck for what. The middle sister because she now has her own apartment her own car and her fiancé and because she has a more stable job than me at the moment she’s acting like she wasn’t in my situation a few months ago she’s now better than me I asked her to get something for me. She gets something totally different. I told her this isn’t what I asked you to get for me. I already have this in my house she told me to get over it and stormed off so I said to her you know you could’ve just said you didn’t wanna do it. She didn’t told me to stop texting her phone then she goes call our mother and tell her mother that I’m arguing with her for no reason and guess what I am being told to apologize. there’s many other instances that I’ve proven to me that I am the black sheep of my family so I decide to be the black sheep and stay the fuck away from them. I've chosen to detach from the family drama, asserting my focus on my child's needs. Despite this, I'm being criticized for being too harsh.