emotagonist

n. One who, in there self-pitying self-loathing (such as a teenieemobopper), turns their remorse into agression and lashes out at those around them.

v. The act of heavily guilt-tripping a person by use of self-pity, esp. when the guilt shall actively harm or upset the guilted; "emotagaonism"

emo + antagonist
aggro + angst