Oh this is boring.
Criticise an individual teacher - fine.
Ask advice about what your particular school is doing. Is it acceptable? How are other schools managing? - Fine.
Criticise the Government's lack of guidance - Fine.
Criticise individual Head Teachers for their directives to their staff - fine.
Criticise ALL teachers and then say they're being unreasonable when they object - NOT FINE.
It's pretty simple, really.
I'm not hearing this blanket criticism of any other profession.
And all it is doing is helping out the Government.
Divide and rule - set the parents against the teachers and no one is looking at them. Win.
I'm really sorry that some parents are getting rough deal and less than ideal education for their children. No, it's probably not good enough and yes, there are probably other way.
It's not often the teacher's fault, though - and if it turns out it is an individual lazy/useless teacher then that's not great. It is still not ALL teachers.