I was "misdiagnosed" with autism (by which I mean my guardian just decided that was what I had, and used it as an excuse to justify controlling my life) so that was fun. Basically the whole "autistics barely count as human beings" bullshit. I'm still trying to figure out how to function as a person much less an adult.
It turns out I probably do have pretty severe ADD and possibly dyscalculia, but the fam (different from the ones above) doesn't believe ADD is a real thing or worse think you just have to "power through it". So they aren't actually interested in helping me get access to medication, even though it would probably help me hold down a job and take more classes at college. What's worse is that meds for ADD have some of the highest effectiveness for people that actually need it, but because of all the misunderstandings surrounding the disorder it's hard to get a diagnosis even if you have the means.
For those wondering why that's a big deal, ADD can cause significant impairment in emotional regulation, memory retention, and executive function - the ability to plan and then execute an action. So it can be a huge pain in the ass for getting anything at all done.
I have ADHD predominantly inattentive (also known as ADD) and if you ever want to chat about it, I'm available.