"Abortive" means "failing to produce results," so it denotes a sorrow, probably short-lived, that doesn't cause the person to change. Likewise a "shortwinded" person quickly loses his breath on exercise, and therefore an elation is "shortwinded" if it ends quickly because it's exhausted.
Since
> Gatsby is dead
by the end of the novel -- and the reference is to "men" in the plural -- Nick must have lost interest in men in general, because their emotional storms, however dramatic, quickly fade out with no impact.