Please help me, my mom is 100% insane and will never admit to it.?

My mom has always been very stubborn. She is a free spirit by all means. My dad says throughout their whole marriage she's been a bit off. Well for about 3 years it's been pretty bad. And getting progressively worse and worse. She would always complain that she has to cook, clean, do laundry and take care of our pets everyday. Well I was so sick of it, that I took over all the responsibility. I wash the dishes, do the laundry, and I prepare my own meals. I do not give her the opportunity to complain about anything; yet she still does. She's jobless, friendless, and incredibly unsocial and unsuccessful. Everyone else in her family is very wealthy and happy living in New York. We live in a small hick town in Florida. She is also a hoarder to the highest degree. She has EVERY broken toy, old pair of shoes, papers from school, etc. She refuses to part with anything. Also, she raises essentially a "squirrel farm". That takes a lot of her time. Especially since she complains about taking care of our 4 cats and 3 dogs. 2 of the dogs she wanted, all 4 cats she wanted. After her dog died she quickly took $500 out of my dad's wallet and bought a new puppy. She always complains about money, yet refuses to work. She says her job is to clean up after 3 "full grown infant ". Ever since I was young she would steadily verbally abuse me. Now I'm 14, and the one thing I can thank her for is giving me the worlds thickest skin. Nothing bothers me at all. My 12 year old brother…not so much. He is over sensitive to the point that it is ridiculous. And recently she's started abusing him as well. And he definitely cannot take it. He's always hid in his room in fear of her. Which I get the blame for. She says that I threaten him and abuse him when no ones around. She constantly checks his phone to see if I texted him mean or hurtful things. Which I never do. She is extremely paranoid. I'm not a great kid, but I really think I deserve better than this. Her and my fathers constant arguing is giving him extreme stress and anxiety. He is always sick to his stomach. He hates answering his phone when it's her. We have, all 3 of us, told her to get out. To leave. To never come back. To take as much as she needs out of the bank, go where ever she wants and never look back. Yet she refuses. She is so unwanted. She tells all of her family about how I'm a horrible psychopathic delinquent. And how I'm such a bar influence. I make good grades. Play many sports. And perform well at them. Never drank or done drugs. I don't know if it's resentment towards my father, or what. But I just want it to stop. Please make it ******* stop.