Gee, if you weren't exaggerating or lying, your mom sounds like a douche.
In my case, I blame my mother for showing no interest in my studies. It's a strange case. It's not exactly like she ignored it... let me explain:
She paid for an hour a week of maths and 1.5 of english, but otherwise, she didn't care.
She almost never paid for textbooks, I mostly had to use the ones that my three year older sister used, most of times they were different so I couldn't do much homework because the exercises were different than in the current version. She was unwilling to buy a lot of school material, I had to use like three 80 page notebooks for a WHOLE HIGH SCHOOL YEAR. For ALL classes. She almost never felt like giving me the money for buying pens, rulers, etc... and she didn't want to buy me a scientific calculator. She said: "if it's more than 15 euros don't buy it" What a joke. I had to pay it with my own money, and I only managed to get those shitty ones without the natural display. And no, we weren't poor. In fact, our house was big for our city, my mom went to the gym, we traveled often, most of my family members used Apple products (I didn't, of course), etc.
My mother was also a nasty person, she screamed very easily, she was agressive, (seriously, I once remember that she started hitting me in 6th grade because I didn't go to school with sport shoes, I went with *regular* shoes. Asshole.)
And she also did nothing about my sister. My sister was terrible. She bullied the fuck out me. Bullying that happens at home. And I'm not talking about two brothers who dislike each other, that girl did truly cruel things that I'll never forget, she's probably the source of my low self-esteem. And my parents did NOTHING about it. Once when I was 10 they found me crying with my face full of blood because my sister hit (I called her a bitch multiple times because she was making fun of me) me and what did they do? They said "you guys could have lost an eye or something like that". Yeah. No punishment or anything.