At the K-12 level, education is lousy for several reasons.
First, the education model is the worst way to teach children. Few students learn by sitting down, being lectured to, and then going home and struggling with homework. I highly recommend the Montessori approach, for Maria Montessori looked at how children learn, rather than how adults think they ought to be taught.
Second, K-12 education is bedeviled by every stupid leftist trend, from the “whole word” approach to reading that left a generation illiterate to the insistence on bringing transgender sexuality to kindergarteners.
Third — and there are wonderful and notable exceptions to this problem — women’s lib meant that women at the top of their class were no longer limited to teaching, nursing, and secretarial work. They went on to become high-paying professionals. Most teachers are now drawn from the bottom third of any college class.
At the college and university level, the problem is that these institutions are leftist indoctrination classes. They have little time to teach reasoning and knowledge. They’re too busy shaping little Marxists to go out into the world and support Bernie Sanders.