AITAH for blaming my family for the lack of social skills?

Throw away account for obvious reasons. My parents divorced when I was 8 and since then I have been living with my mom. My dad literally vanished from the picture and started a new family with new kids. Meanwhile my mom was always mad and annoyed at me like it was my fault they divorced but she remarried herself within next couple of years. Despite me being 25, she keeps mocking me for the lack of the social skills, dating life, you name it. I got so sick of it so I told her the reason I don’t know how to communicate property and lack basic social skills is her due the following:
She never had any problems with banning me from eating at the kitchen together with her and her husband as she obviously never had any issues with her husband making fun of my eating habits or comparing my food to biological waste(note that I am celiac and he was literally making fun of gluten free food). But yeah, let’s ban the kid from the eating with the family and then be surprised that I had tendency of hiding in my room 24/7 when I was living with them;
She never had any problems with going on multiple holidays with her husband and leaving me home alone for weeks without even bothering to check in once per week. Apparently, it was also my fault she never called me as I gave the attitude over the phone. But what else to expect from 13 years old who gets to spend the summer holidays home alone without anyone to talk to;
I was bullied at school pretty badly and ofc my mom just had to take bullies’ side and agree with everything they said about me;
Her husband has the son my age and he was living with us during the weekends. Yet again, it was never a problem to ditch me at home but go to the cinema as a happy family. And even now my mom pretty much still favors her husband’s son over me;
Never teaching me any social skills either. Whenever I wanted to find some hobby just to make any friends, ofc she would call me names and make fun. At one point, I was learning Spanish and she made fun of me by saying I was already dumb, don’t need to make myself looking way more foolish. Guess what? Now her husband’s son is learning Spanish and ofc he is so smart/amazing/hardworking unlike me….Same with teaching me how to be a female-pretty sure I was partially bullied due to looking 40 years old secretary in the high-school, I was begging her for ages to let me choose my own clothes/style/etc-ofc not. Even now she is still criticizing my looks and whenever I try to do something with myself like dying my hair blonde.
After telling my mom everything, she ofc called me a ungrateful B**** and told me she regrets having me. AITAH?
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