Sometimes parents are delusional, self loathing ass holes, that are angry at the world and take it out on their kids. Sorry that your parents are like that. My dad used to say some pretty fucked up shit to me when I was younger, and if I started to cry, he would start calling me a little girl, and tell me to stop crying like a little bitch.

I know how it is and it sucks. Just try and become as independent as you can, and rely on them as little as possible, until one day you're able to be completely independent.

In the mean time, try your best to eliminate all the things they critisize you for, or all the things they can hold against you. Save up your money and pay them back for that computer, so they can't hold that against you. Try and lose some weight, so your mom can't insult you about your weight. Good luck.