'Martyr complex', huh? Haha, that's just a glorified way to say 'victim complex'.
Tied in with what elcare was saying, the unhealthy INFJ that continuously plays the victim card will try to drum up self-esteem inside themselves by thinking they're martyrs.
Ex. - INFJ helps all of their friends with their respective love problems, but feels completely alone in their own struggles with love and focuses on how no one seems to care or notice (there goes the victim card). But they also don't like to think negatively, so they give the situation a make-over be repainting themselves in the light of everyone's cupid in shining armor but each arrow that is shot drains a little of their life and they have no energy left for themselves.