I too used to have a disorder that made me occasionally write nonsense. In my case it turned out to be fixable by reading a lot of LW, in particular Eliezer's and Yvain's posts, and then putting a lot of work into my own posts and comments to approach their level of clarity. It was hard at first, but after a while it became easier. Have you tried that?

Right now your writings look very stream-of-consciousness to me, like you don't even write drafts. Given all the criticism you get, this is kind of unacceptable. Many LWers write drafts and send them to each other for critique before posting stuff publicly. I often do that even for discussion posts.