The only way to stop being bullied is to Knock out or humiliate the bully. I prefer a small billy club.
Sad but true. One of teachers I had in high school told me a story once of how his big brother was getting bullied by some kids in the neighborhood my teach being five back then one day just grabbed a 2x4 and walked over to the kid and smacked him across the face with it which koed him and walked off. Said his brother never got picked on agin.
Once humiliated they stop as u said.
"The fat man flies at midnight"