Gah, it's not even the politicization! I dare you to sit through a 3rd grade class at your neighborhood school. Nothing gets done. They do projects with little to no mooring to curriculum. That is, unless you live in a top percentile district that values curriculum mapping, but then you were already going to be in the middle class at least. In the meantime, most of these schools are day cares so parents can work. Marx wasn't that wrong.

At my daughter's kindergarten they provide hours per week of ESL support, in addition to the regular material. The walls are covered in curriculum, including more about phonics than I was taught in my first 2 years growing up in the southeast. (Thankfully that era's anti-phonics fad passed by and even those schools got better.)

Things aren't always getting worse. And IME the schools tend to get better in the long term.