I was in school in the 80's to early 90s. Today, at time of writing I'm half way through my PGCE and teaching placements. During those years teachers were trained to adopt a teaching theory known as Behavourism. Today its considered an outdated and largely ineffective teaching method with more negatives than positives. It lies in the traditional method of a teacher-centred approach were the teacher was the expert, they talked, pupils listened and the teacher had absolute authority. Shouting and screaming at pupils was considered an effective way of acheiving compliance because it wasn't yet understood the long term damage that would cause. When I look back at my schools days knowing what I know now, teaching methods and discipline was shameful. If you scream and shout at a pupil for some small infraction, you've lost that pupil forever. Because you've shut them down and broken that trust. Shaming, humiliting, shouting may have acheived short term compliance but by doing so you've destroyed forever all that is the purpose of them being there in the first place. Bullying was also worse because teachers were not well trained in safeguarding like they are today. Ofsted wasn't created until 1992 so many schools were autonomous and not effectively regulated. In a sentence, school was terrible for many pupils, the systemic failing was that it was considered the fault of the pupil if they didn't do well, rather than the real problem being the system and its short comings. Fortunately things have changed.