You need to back up a bit. The efficacy of a thing that is involuntarily funded doesn't provide a reason to use threats to acquire funding. Whether public schools suck (they do) or not, the way they are funded needs to changed...because it is wrong.
You need to find a way to create competition and apply free market principles which rely on peaceful and voluntary funding from WILLING customers. If you fail to do that, what differentiates public schools method of funding from the same method used by thugs?
There are private schools in the USA. Free market principles are applied, they compete and the market is there for provate schooling....
You know why this industry has not outgrown and wiped out public education? I mean you would think companies would be jumping at the chance. The market is HUGE given how is mandated every kid go to school.
It is because the industry has seen that there is no profit in education past a certain class size. The logistical requirements are too much and the risk is too high- real estate, teachers, security, insurances etc. Its not a profitable enterprise to make education accessible to EVERY person. Education is only profitable if student selection is limited, classes are small, and the cost per credit is high. There is no other argument this is just the reality of the world we live in. Anything else is based on false premises and assumptions, not grounded in facts and reality.
So there are two options: let capitalism take its course and have the majority of people in the US completely cutoff from education bc of price - or you provide schooling for 'free' and let each individual make the most of school if they choose to.... make it a public service that has to be provided by society and that way everybody benefits.
You can try to say whatever you want about duress but the bottom line is history and reality prove you wrong.