My biggest regret about my 4 years at Virginia Tech is the opportunity cost. I could have been spending the years of my life where I could learn at a vastly accelerated rate compared to present learning useful things.
Instead, my double major in mechanical engineering/applied economics was heavily loaded with highly inefficient, archaic classes in subjects I cared about combined with a heavy dose of mandatory humanities type courses that were essentially ultra-leftwing indoctrination courses. For example, my Latin American history course was a non-stop "Latin America is a crappy place because it doesn't have enough Marxism" course.
I was assigned various books, and as long as I wrote about the books with identical conclusions to the professor, I got an A, no matter how horribly written. If I wrote eloquently about why I thought the book about Gaitan's socialist movement in Columbia wasn't as angelic as depicted in the book, I got a D. Another book that was assigned reading was "Pedagogy of the Oppressed" which is essentially a handbook telling you how to get otherwise happy people to realize they are oppressed and embrace Marxism.
This was the early 2000s, and the predictions about Columbia, for example, couldn't have been more wrong. It's a vastly improved place compared to then, despite the depiction in the class of a sinister, evil, predatory capitalist society. No matter what South American country you discussed, if it was communist/socialist, it was a paradise. If it wasn't, it was a dictatorship. The teacher wouldn't stop talking about how amazing Venezuela was, and how Hugo Chavez was "misunderstood."
Another class I took was called "Economics of Poverty". The professor is a person I can't forget, because long before I had ever heard of Elizabeth Warren, she was a fair skinned, blue-eyed white woman who claimed to be half Native American. I never believed that for a second, and it was obvious she made this claim to advance her career. My favorite moment with her was when she told the entire class that "most of you will graduate from this school and be unable to find meaningful employment. Our economic system doesn't value what you've learned, and you need to fix that." It was a soul-crushing, disempowering experience and I'm furious about how much I bought into her and her colleague's bullshit back then. Pessimistic losers who've never left their bubble ruining young minds as they themselves live off of the oppressive debt the students are taking on.
I don't have a problem with nutbag activists, but I deeply resent the Federal government subsidizing them and their foolish causes, on the backs of 17 year olds signing away their lives for debt.