Because the kids are not at home? Just relieved they are back in school. Also they are just about coping with cost of living crisis, cold, hunger, work etc. And some of the noise was not about the children before (as you have pointed out frequently)
Death by a thousand cuts:
Teachers are not going to manage SEN children as well when teachers are tired and stressed. (Based on experience as parent of SEN children and varying levels of tiredness and stress) They do not have time to support or adapt learning. (Need more teachers,training and TAs) More difficult to teach these kids as the gap gets bigger and they struggle more.
If the support is not put in school in nursery for children then problems get worse up the school, gap widens. Some schools don't manage SEN well. (Seemed to be school wide policy that's inflexible: not sure whether it was the school or what has been imposed on the school, lack of capacity in teachers due to overload of work, recent teacher training trends, or NQTs inexperience ['cos they are cheap] and some of the experienced teachers managed kid well) kid was damaged by inflexible school system (stopped talking for a term self harmed) ,then no help available from underfunded services. Thus arrives in year 7/8 requiring extra support and making more work for staff.
Add up lots of kids where inadequate support early on has caused more difficulties/bigger gap/ more behaviour issues and you get harder work conditions. It doesn't take much of a difference in each child to cause collectively a big problem.
Incidentally, small free adjustments have made a big difference. (Got a good Sendco now)
Similarly for parents: parents who are struggling financially and working more and are more stressed are not going to be able to provide as much support at home, cook as healthy meals, read as often, help with homework, have the patience to teach kids stuff when it's quicker to do it yourself, have the energy to discipline or impose bedtimes as effectively.
Parents of SEN children don't get support and are not going to be able to do the extras. Kids are not getting support so parents are struggling. (Teaching use of knife and fork is not a priority when you are dealing with other stuff first and six hour long meltdowns after school)
It all goes back to not enough money. Not enough teacher retention to get experienced teachers. Not enough CPD. Not enough support staff. Not enough support from outside agencies. Too much work load, too big classes, not enough support for parents, not enough NHS space for assessments...
Has it got worse since the Gove curriculum?
When the children were younger things seemed to be very rigid in teaching some stuff..less ability to adapt work to the class. Quite a change in a few years since I left teaching.