No. Not real. It is no longer a diagnosis. That means it is not real. Your link even says it "formerly described" a disorder. Do you know what "formerly" means?
And your self-diagnosis is also meaningless. Even psychiatrists do not self-diagnose.
If we change the name of something or the category it belongs to that doesn't mean he underlying thing doesn't exist.
Also, I know what formerly means.
It's the first link that explained the difference I came across.
Wait, do you think people can not have mental retardation? What?
Ok, here Wikipedia instead:
"Mental retardation, also known as intellectual disability, a disorder characterized by significantly impaired cognitive functioning and deficits in adaptive behaviors."
Your snipped links to the page I provided screenshots for and linked to. The one that literally says 'retardation' is considered outdated and offensive. Again, nice try.
Well, I do believe I have ADHD, OCD, maybe autism, Schizoid PD (NOT schizophrenia) maybe more.
So yes. I very much so believe it has something to do with it.