What Voldemort Left Behind

Harry Potter never fully recovered from the war, it affects his life more than anyone. Being an Auror had taken his mind off things but eventually it began to make things worse. His three children have a loving family and attend Hogwarts, their lives are full of learning spells and playing Quidditch, everything Harry wanted for them, but still their lives are touched by the suffering of their parents. Are Harry's feelings of guilt and horror just a normal part of recovery, or is there something more sinister behind it?