Sadly, I found nothing in your article to be in any way surprising. While you seem to be unusually motivated, most people gravitate toward the teaching profession in the USA because they want an easy quiet life. They are, temperamentally, people who keep their heads down and turn aside from challenges. If the USA valued teaching more highly it would (a) train teachers more adequately, (b) pay them far more, (c) demand far more of them, and (d) be far more selective regarding candidates. As it is, teachers are too often living proof of the adage, "those who can, do; those who can't, teach." And thus expecting spineless sloths to be agents of change is to be perpetually disappointed.