This is the truth. My wife has teached 25 years in public schools and we have a daughter in them. The problem is parents who don't care. The best public schools are the ones with a lot of parent involvement, and the best students are the ones with parents who are fully engaged.
I've seen this over and over again. Furthermore, I grew up in public schools, good ones and bad ones. I went to six elementary schools, 2 middle/junior high schools and two high schools. We had little money and moved around a lot. But I was a good student and made good grades because my parents made sure of it. Some of those schools were good and some bad, with teachers the same way.
The public schools haven't failed American kids, sorry parents have.
In the Finland model, the parents don't matter that much but they produce among the best educated students in the world according to the Pisa standard. They do require very high qualifications for teachers though. This is an argument against the criticism of parents that are unable or unwilling to do a good job parenting.
I generally disagree with these arguments but it is hard to argue with their success.
Singapore was an island that was kicked out of Malaysia about 60 years ago and they wanted to move from a third-world country to a first-world country. They have largely succeeded with education as the backbone. You need to raise a generation that becomes parents to get them to the point where they support education but Singapore also requires high qualifications for teachers. I visited one of their primary schools many years ago and what was amazing was how little staff they had compared to a typical US school. I couldn't find anyone to talk to because it seemed like all of the staff was teaching at the time.
Now you may want parents to change the schools but the parents' primary job is to ensure that their kids are educated to whatever definition of educated you consider reasonable. We happen to be a democracy though and schools are usually run by school boards which are composed of elected officials. So school boards are what the voters vote for. This can be good or bad and good or bad can depend on what you think a public school education should be.
You might run for school board, get elected and find out that there's a huge amount of inertia and red tape and government regulation at the state and federal levels that govern a lot of what you can and can't do. You might join a school committee and find out how slow things really move.
Or you may simply disagree with the methods of teaching used in your local schools and not have the political clout to change it.
Remembering all the while that you have to get your kids educated and that time doesn't stand still for you to make changes to your local school district. There is a call for parents that want to use private schools to use public schools instead because the schools need those parents but those parents may not feel that their presence will fix problems in a timely manner for their kids.
You can look at the disparities between what wealthy districts spend on education and what the typical district spends. Money doesn't always buy you better education but it seldom hurts. You can hire better teachers and give them a reason to stay and provide more facilities and extracurricular activities that develop the whole child.