That designers are in any way “special” or “different” from other humans in other professions is a myth manufactured among designers.
To be fair, other professions do it too - You can take the introduction you wrote and swap “designer” with “entrepeneur”, “photographer” or “upper management” or whatever and everybody in the respective group would probably agree with you. 
If you have a problem with relationships don’t blame your highly specialized designer brain but rather look at your own personality. That’s not only less generalizing but probably also more helpful to actually tackle whatever challenge you are facing.
I am going so far to claim that all grown up human beings in a stable social position in ANY profession are equally pretty/ugly; smart/dumb; nice/horrible; competent/incompetent… etc… The distribution is roughly following the gaussian distribution and it even applies to people from vastly different cultures. Can’t back that claim up and can only quote my own life experience here, though.