My dad always told me that during the 40s and 50s children would be paddled for being disrespectful. Students wore uniforms. Parents would be angry at their children if a teacher or administrator scheduled a meeting. The parents would be mad at the kids. it is clear that times have changed dramatically so I think it’s insane to expect the model of the old times to work. If you want a good result for your child then enroll them in a program that is suited for these times. I suspect private school is the only good option.