Nash was great in spite of his issues, not because of them; his work was a real, useful contribution to human knowledge, because (in contrast to this guy) he worked with the wider mathematical community, which then in turn later built on his work.
Being afraid of men in red ties is still a dumb thing to do, and won't make you a great mathematician. We romanticize the outsiders, but the great bulk of the mathematical edifice was constructed by relatively ordinary, well-adjusted people like Euler. If you want to be a great mathematician, it isn't Nash you should model yourself on.