I'm not sure there is much "exaggeration" going on ART. Many public schools are teaching the egregious lie known as "Global Warming" (which, after being unequivocally proven to be a lie, was changed to "Climate Change"). They also refuse to properly teach the U.S. Constitution. And then of course there is the Common Core nonsense (which, in all fairness, most teachers I know hate).
Teachers don't set the curriculum so I'm not blaming them or you. But there is a huge indoctrination program being utilized by many states (sadly).
Properly teach the Constitution? What evidence do you have of that? Almost half my career has been teaching American Government classes at the high school level.
One of the biggest problems I have with conservatives who criticize education is the belief that because someone apparently doesn't know the Constitution or ignores what they were taught, that somehow equates to that the never were taught. Obama is an alleged Constitutional Law instructor and Harvard Law alumni, but he makes policy in direct conflict with the Constitution that any middle-schooler should know is illegal. That is why the courts smack his down on a regular basis!
As far as Common Core goes, the ignorance on that topic abounds. Common Core is not the problem, but the curriculum bought by school districts aligned with the Common Core standards, which they call Common Core, when it is not. On this forum and others, I have heard conservatives railing about the Common Core Social Studies Standards. It is really so sad that no such thing exists and anyone not knowing that should be immediately dismissed as a loon.