Have you ever been tested? Do full psych evaluation with a psychologist. See a psychiatrist etc get to the bottom of it

You have college degree so it's unlikely you are cognitively impaired ( let's not call people including yourself "slow"). You can improve you social skills in therapy ( which you refuse to try). You regularly attend gym so I doubt you are that uncoordinated. I doubt you are clumsier than me and my husband. We can't even walk around our own house not bumping on things.

Who looks down on you and what evidence of that do you have?