I (17f) am a disgrace to my family and they want to disown me, desperate for advice.

’ve never been particularly good at sports. Never been especially smart, in fact I fail most of my exams. I’ve never dated, or had any experience past a kiss. I’m average looking. I lie, deceive and am cunning with my parents who are firm with me, bc I just feel like I want some power, so I try to be mature In ways which don’t benefit me or them at all. I’m home educated and I don’t feel like I’m good and present with my friends when they need it. My mum said shes done parenting me and needs to focus on my younger brother because I’m a fuck up and a disappointment, and she feels like shes failed at parenting me. I feel empty, sick of life and good for nothing. My mum has stopped my therapy bc she doesn’t think I’ve been taking it on board, I felt like I was but ig she’s right. I am done with all of this and I’m searching for meaning in life or a way to turn my life around, I feel like it can’t get any better fsr. My mum wants to disown and kick me out of the house.