Two words that would describe Ralph after his transformation in "Lord of the Flies" are "desperate" and "haunted."
Evidence: By the end of the novel, Ralph is overwhelmed by the chaos and violence that have erupted among the boys. He experiences a profound sense of desperation as he realizes that the civilization and order he once tried to uphold have completely disintegrated. This is illustrated when he finds himself being hunted and has to flee from the other boys, feeling an acute awareness of the savage instincts that have taken over, leading him to a sense of being haunted by the events that have unfolded.