It's terrible that something that should have been wonderful was so painful for you. I've completed 11 years of post secondary spread pretty evenly over 30+ years of adulthood and loved it more and more as I've continued. Thinking about starting a PhD in year 50!
I occasionally feel the calling to go back to school for the sheer joy of learning and mastery. It’s an odd feeling though, because I always hated school, from elementary to undergrad.
No, there are no good schools.
High schools went downhill when teachers stopped spinning homespun silk
https://en.wikipedia.org/wiki/Prussian_education_system