I wonder if you've read the novel "Flowers for Algernon"? If not I have a feeling you'd like it (although perhaps find some of it difficult going - I certainly did).
I read the short story and found it to be an enjoyable but somewhat depressing read. Losing your intellectual abilities while being able to perceive that you’re losing them sounds awful :(
I read the synopsis and "noped" out pretty hard. I'm definitely no genius, but losing what little I have would be horrifying. All those years of work to build an understanding...gone.
