Many of them weren't even that. Take a look at the graffiti on the walls of bathroom stalls and you'll find more errors in spelling and grammar than you'd think possible for college students.
Then deal with them in the work place for about fifty years and the levels of ignorance and stupidity are astounding. Just one example are basic math skills. For example, most of them working in retail couldn't compute how to make change unless the cash register does the math for them. That's just one of scores of examples.
Another is to try giving them the USA Citizenship test, closed book. The Civics portion. Astounding is how about 4 out of 5 high school to college age young persons will respond first with "What is civics?"
View the complete list of all 100 official US civics test questions and answers for the citizenship interview. Updated for 2026, with state-specific answers.
civicsquestions.com
One exception, so far, to the above are technical degrees such as medical, engineering, and most of the physical sciences. As far as math and the science/technical part of their course requirements that is. Many of them also fail on civics and other basics like history and economics.