Resentment, self-pity.

“For those who have suffered adversity or misfortune and find these difficult to accept, without complaint or resentment, as they judge life much by the success which it brings. They feel that they have not deserved so great a trial that it was unjust, and they become embittered. They often take less interest and are less active in those things of life which they had previously enjoyed.” – Dr. Edward Bach