I have great memories of school, right through from primary to sixth form ( late 70s - early 90s) but as others have said it's totally subjective.
I lived in a semi-rural location, all the schools had a mix of socio-economic groups but most of us were working class or lower middle class.
I was a bright and quite docile pupil who loved school work. I imagine that a lot of what we did in class wouldn't be 'engaging' enough bh today's standards but I enjoyed it all. Except maths. 😁
I couldn't fault my primary school teachers. I always felt safe, looked after and appreciated. More so than at home, but that's another story...
In secondary school we did have a couple of pervy male teachers and a group who used to go and get quite merry/borderline pissed on a Friday lunchtime who would come back reeking of booze but would still manage to teach.
Discipline was good. Some of the teachers were old school and we obeyed because we were afraid not too but I don't think it did anyone any harm. We knew our place, why we were there and what the consequences were if we misbehaved. There was some low-grade bullying / teasing among pupils but I'm not sure how it was dealt with. No violence problems bar the odd punch up between 4th year idiots.
As a teacher myself (but not in England), looking back I appreciate the freedom our teachers had back then to teach what and how they wanted, within reason. The rigid, box ticking, exam- focused environment that teaching has become seems less nuturing than how I remember things as a pupil where we were given the time to assimilate and develop at a slower pace.
And I am so, so pleased that we had no idea what internet was, only had one Commodore 64 or Atari per family if we were lucky, and the only people to have mobile phones were on Magnum, Knightrider and the like!