You have no idea what the parents did all these years. I can tell you from first hand experience that parents can talk to the school, the administration, the school board all day long they will still do nothing until it is too late. They always blame the victim. Cut the parents some slack.
I just don’t understand this if it was going on for years, nothing was being done, and they still sent the child to school knowing he was miserable and will be bullied.