But in your story, a lot of the problems came from people giving you (wrong) diagnoses. dkarl is saying what works for him is just working directly on the constellation of traits he has without looking for a diagnosis. True, things got much better for you when you got the right diagnosis of autism. But as i14ng points out below, autism is "just" a name for a for a constellation of traits similar to dkarl's.
It sounds like your case is a lot worse than dkarl's so I believe you that naming the syndrome was a good thing. But overall, would you have been better or worse off if society just made fewer psych diagnoses and you never had the right or the wrong ones, but people just helped you work directly on your traits?