"This was not the case a decade ago"
As has already been discussed on this thread, changes made to the curriculum a decade ago, plus the Pandemic, have obviously changed things.
I don't think kids are 'looking at each other and kicking off for the fun of it' That just smacks to me of those who put kids with ADHD down as 'naughty' and again, usually blame the parents.
I've not earned decent money in over a decade. I used to have a fantastic career. I just watched it all totally go down the swanny in front of my eyes.
Even with regard to the apparent parents who 'don't care'. I overheard a teacher / parent conversation recently (we were having a parents evening in the hall, so not much privacy) The conversation with the mother was along the lines of her daughter never having handed in any homework whatsoever. It was deemed that the parent didn't care and was making no effort to help. I'd say that was a big pointer to something being wrong. Social issues, mental health, family problems and yes, potentially learning difficulties and / or Neurodivergence. There didn't seem to be much support involved as the parent was deemed to be avoidant and combative. These are often the parents that teachers don't have any 'admiration' for, and are therefore dismissed as just useless and at fault.
Imagine not being able to reach out for help because you don't know how to, and everything going to shit around you.
Jumping through hoops for OFSTED and ever changing curriculums, coupled witu class sizes now mean there's no scope / time / budget to offer meaningful support. And so, the most vulnerable just slip through the net every time.
Modern life and its stresses is totally unsustainable going forward, and something needs to start changing sharpish.