One example that frustrated me as a taxpayer and parent with kids in school: here in California, it was Democratic policymakers who removed Algebra from high school curricula, arguing that it would help address disparities among minority students.
Changing math curricula isn't denying math and reason itself.
[0] https://www.nytimes.com/2024/05/13/health/hilary-cass-transg...
[1] https://www.nytimes.com/2024/10/23/science/puberty-blockers-...
These problems are not a simple matter of funding. One need only at California's High Speed Rail project. Costs have soared from early estimates of $15B to now more than $130B+, despite almost no track being laid over the last 15 years. This is in a one party state with complete Democrat control, so you can't blame Republicans.
Bureaucratic mismanagement and inefficiency are the overwhelming problems now.
In my country, most colleges are state owned and free, I had an engineering degree for €600 per year. Skyrocketing tuitions in America is purely a result of profiteering, largely enabled by the republicans and not kept in check by the weak democrats.
But if you still think gutting your public services will improve anything, just look at what austerity did to the UK.