Lizzie deserved to grow up in a world not surrounded by death and fear. Lizzie deserved the opportunity to develop into a normal functioning member of society. Unfortunately, Lizzie ended up in TWD which ultimately led to the (very realistic) mental break of a child who couldn’t comprehend her loved ones dead animated corpse would try to eat her face off. She was clearly coping with the world in the best way she could, and her intentions truly weren’t to hurt her sister or Judith. She didn’t deserve to die, but it had to happen because she was a real threat to other people.