Some of it definitely is. Schools and children's services have been completely starved of funding for the last 14 years and that has had a huge impact. How much of the current poor behaviour in primary schools is down to cuts to services like Sure Start? The fact that the 2 year health check is now done by filling out a form instead of the child actually being seen?
At the same time covid has also had an undeniable impact, which links to the collapse in children's mental health services that I mentioned. But the Tories refused the suggested £15 billion children's covid-catch up scheme that could have gone some way to alleviate that.
Teacher recruitment has been below target for years, but has plummeted further since covid. Some of that is down to how poorly teachers were treated by the government during the pandemic, some the obvious result of years of increasing expectations and reduced pay. However it also seems to be an issue in other countries so isn't all down to government mismanagement.
And SEN - provision has been devastated. It started with austerity when the first people to be made redundant were TAs and pastoral staff. There seems to also be a huge increase in diagnoses and needs - EHCP costs are just spiralling out of control and it is sending councils bankrupt. These things put together have been a disaster.
The thing with teacher recruitment that doesn't get mentioned very much is that it is pretty shitty for kids to go to school and be faced with incompetent teachers (heads admit they have to hire teachers they would rather not because it's them or no one), supply teachers who don't know the subjects they are supposed to teach because they are hired to be a warm body at the front of the room, and just an endless turnover of staff. Cover lessons are not generally a great time for either the cover teacher or the class.
The Tories definitely have made a huge contribution to the problems in education, but there are other things at play too.