Cry for help

I’m sixteen years old and for my entire life I have been a smart kid, I’ve suffered with severe ADHD and am on the spectrum so when I was young making friends was initially very difficult. About 4 years ago, my dad came out as gay leaving our family in financial ruin and leaving me, who had always been one of the smartest kids in most classes, failing and struggling to get by. Since he left I have never had a grade above a 70% for a core class, and I still don’t know what I’m doing in physics. In the years that followed my dad leaving my mom would bring home a new man every week and at that point she still didn’t have a job. A year after that started I ate a piece of candy laced with marijuana and began having seizures for about six months missing most of my freshman year. When I came back to school I was behind and failing all my classes and within a week of me coming back I was approached by a woman who would end up manipulating me and sending me into a downward spiral even more so. Soon after that I came out as bi to my family and friends and they were not supportive my mom believing that bisexuality is just a state of denial and you can never truly be bi, my friends didn’t talk to me and I was extremely depressed, I even attempted to take my own life three times and was sent into a psychiatric hospital twice and during that time I was raped by one of the other patients. I have not been to any sort of therapy since then and it is coming up on a year since I was raped. My dad claimed false abuse charges against my mom forcing her to lose her job and making us even poorer with the two hospital stays involved and now three of my four siblings are with him god knows where. I have not truly been happy in four years. I have gained over fifty pounds live in filth ( piss and shit all over my house) and half of the time cannot bring myself to do basic hygiene because “what’s the point” I feel invisible to everyone, I broke my foot last week and nobody noticed until I had to lift something at my volunteer work and it fell on my foot with a boot on it. I am seriously considering taking my own life as there is no other option for me at this point, what I want to do in life is almost impossible if I don’t have tens of thousands of dollars to blow away and I can’t afford going to college to be an engineer. The military was my last hope but I got in touch with a recruiter who basically said I was a lost cause and would never make it in no matter how hard I tried. If any of you have any sort of advice please help me I desperately need it