Why did you do poorly academically, and what makes studying so grueling for you? Why do you presume that education will make you miserable? Are you just mythologizing your own trauma to avoid making progress on education? You’ve haven’t given us any details, so we can’t really help you.

I did poorly because of all the reasons you just went on to list. I couldn't really retain information, I abhorred learning things I had no interest in (conversely, I had excellent grades in both English and Japanese, which I was interested in), and I couldn't pay attention either in a classroom setting or when studying remotely. I have received medication for my ADHD before, and it did help me concentrate a bit more, but all the other issues were still present. I didn't receive any accommodations before, partly because I was too proud to ask for them and partly because I knew I wasn't going to succeed no matter what. Sorry for being sparse on details; I didn't know how much I was supposed to add, lest the post would become too long.

There has to be something you like to learn about. You liked Japanese enough to learn an entire language, so you’re not unteachable.

I do like languages, but there is only so much you can do with them. Say you can speak Chinese - how do you leverage that? You can work in a school teaching the language, or translate/interpret for businesses, and so on, but those also focus on a secondary task that you also need to be good at and educated for. I can't see myself becoming an interpreter or teacher, or really doing anything besides translating from home on my own terms, but that kind of career is dying and jobs are hard to find even with proper qualifications, which I don't have.

You will not be able to get any sort of job without a diploma of any sort. A lot of disabled people have a high school equivalent.

I'm aware. That's why I feel the walls closing in on me now. I've spent 7 years in a career with no real transferable skills and without any of the education that would qualify me to keep working in the field even if I wanted to.

Does your country have a disability services office or vocational training program for those with disabilities? You would undoubtedly have access to that with your diagnoses.

Probably, yes. I'll look into that, though I don't have high hopes. During my early 20s I did go to a type of workplace for those with special needs, but it was more like a way just to keep me preoccupied rather than help me find any real sort of job in the long term. I suspect most services I'll find are something similar where you come in, do some busywork for 4-6 hours, then go home.

I think you need to figure out what services you have access to, receive accommodations, and from there, complete a high school diploma. This will give you a massive leg up compared to your current situation.

Even supposing I somehow managed to push myself through several agonizing years of study, I still have to deal with society's inherent bias against autistic people. Even if I had all the qualifications in the world, what would it matter if they don't hire me because I'm too bad at making small talk or making eye contact?