It's way worse than you can imagine.
A lot of Hmong kids in the 80s and 90s did not attend the best schools, but I'd say that it was a decent education. Parents back then were still accountable and students felt shame if they didn't do well in school. Students actually had to earn trophies, they received a ZERO for missing work, and there was a thing called "detention".
Nowadays, if you are not in a good school district (especially one that is predominantly black or brown), your child isn't learning anything all day long. Troubled schools don't retain teachers for long, except for the bad ones who figured out a way to game the system, and tend to hire young, inexperienced teachers. Much of this has to do with the attitude of the parents in said districts, who really view public education as daycare. Because of this, they opened the floodgates to Critical Race Theory teaching and practices. After all, when the parents complain about perceived cultural gaps, the school is going to respond by watering down the curriculum.