More (not so) fun facts:
54% of American adults read below a 6th grade level.
21% read below a 5th grade level, which is considered functionally illiterate.
High immigration numbers don't fully explain it either, as first gen immigrants only make up about 1/3 of those with low literacy.
I agree that we have made recent changes that were bad. But we've also expanded access to free lunches in some places, decreased some extreme poverty metrics, have expanded AuDD diagnosis and treatment, raised the minimum wage in a handful of large metro areas, etc.
Is it obvious that a worse teaching method (and the many other bits of bad policy) does more damage than the improvements? This isn't clear to me.