I went to government school before there was a Department of Education. In 4th grade, 1964, my class had a test. One of the questions was "How many states are there in the US?" I answered "50". My answer was counted wrong, because the book said there were "48." Tell me about quality government education. I learned much of what I know on my own, in spite of my instruction. Not to say I didn't have some excellent teachers, but they were not the norm, and there are even fewer now that I've seen my kids go through government schools. But the good ones shine like beacons, and my kids wanted to work and learn, and were drawn to them.
The system itself promotes mediocrity and conformity. You can still break through that, but it shouldn't have to be struggle. The struggle should be to remain mediocre and conform, and excellence and independent thought should be the norm. It's not. The schools don't like those who excel, because it makes others feel bad. My daughter was in Special Ed for excellent students and got to take classes off campus in grade school. High performing students from several schools met for advanced classes. That was nice, but we had to drive her there. The Special Ed students, the mentally disabled, got rides to their programs. The system actually made it harder for the students who wanted to excel. It's insane.