Fuck this loser. He's just using ableism to disparage people he doesn't like.
Anywho, I personally advocate you should try to get a medical diagnosis from professionals and avoid self-diagnosis (though I realize this isn't possible for everyone, especially with how garbage the """"healthcare"""" system can be). The reason is there are illnesses that look like other illnesses.
For example, you may think you're suffering from an anxiety disorder. Except it may not be an anxiety disorder at all and it's actually a heart condition. Those aren't panic attacks. Those are heart palpitations and you have atrial fibrillation. Or how Bipolar II Disorder looks a lot like Severe Depression Disorder. They require entirely different treatments. Bipolar II can be improved with mood stabilizers, but will cause worse (possibly deadly) psychosis if you try treating it with SSRIs. Then, of course, you can have hallucinations caused by Bipolar Disorder, which is not Schizophrenia (which also causes hallucinations).
So please, please see a doctor if you can and don't hesitate to seek second opinions. I say this because you don't have to suffer with something that's treatable. And again, I know this can be difficult because people don't have insurance or because doctors can be assholes/prejudiced.