Petitchat
Those are very good questions.
I think there are several reasons, not just a single one.
I have some concerns/frustrations myself about the education system and I share many of the concerns other parents have - because I have two children (now adults) myself. But many people place the blame with teachers without understanding that we are often saying the same things ourselves and we have no control over any of it.
I'm trying to think of examples but there are so many I wouldn't even know where to start and people just hear a teacher moaning and respond with, "Yes, but the holidays," anyway. There no impetus to change things. Its easier to blame teachers.
Ultimately, the best analogy I can give is telling a builder you want them to build a 6 ft wall. You've given them the space, and told them exactly what resources they need to build the wall and exactly what you want the wall to look like - the 6ft wall version of the Taj Mahal! But you've also only provided them with three bricks, some playdoh and a plastic teaspoon with which to build it - they need bricks, mortar and tools right? Well now they've got them.
It's really obvious why they can't build a 6ft wall but you keep telling them that if they just tried a bit harder, worked a bit harder, put in more effort, stopped complaining and worked longer hours, the wall would look great.
But no matter how hard they try, they can't build a 6ft wall with three bricks, some playdoh and a plastic teaspoon and they've explained why, told you why, brought you over and shown you why. But you disagree and blame the builder for the lack of a wall because you can't afford any more bricks and the playdoh will have to. They've even told you they'd have more luck with a plastic knife but you want them to use a teaspoon.
You really know that they can't build a 6ft wall with three bricks, some playdoh and a plastic teaspoon. You're not a idiot and you know they see it too. But still you persist.
And then someone comes and knocks down the wall and you not only blame him for that but tell him the wall would be finished by now if he'd wokred hard enough and it couldn't have been knocked over. It ls his fault the playdoh didn't cement the bricks and it's his fault that three bricks cant build.a 6ft wall.
So you put him on a support plan because blaming him for the lack of a wall is easier for you than either admitting he needs more bricks and appropriate tools or providing them.
And that is one of the biggest reasons why teaching is exhausting.
It's not the children, its not the pay, it's partly the workload but it's also because a builder is never going to be able to build a 6 ft wall with three bricks, some playdoh and a plastic teaspoon no matter how many times someone tells him to do so, or questions his capabilities as a builder or takes punitive action against him. Because its just not possible to do.
But all the neighbours see is that your wall still hasn't been built and so believe that the builder is lazy and incompetent and maybe he shouldn't be a builder anymore if he's trying to build a 6ft wall with three bricks, some playdoh and a plastic teaspoon anyway. Is he an idiot? Even a 5 year old would know you can't build a 6 ft wall like that.