The entire public education structure is broken
Not really. And I say this as a former would-be teacher who bailed because of weaknesses in the system, and of course, as a grown-up student who can now see many flaws in my the education I received.
On the other hand, of course, I actually got a pretty great public education, at the end of which I knew basic Calculus, electronic circuits, Pascal & C, how to use UNIX, basic writing and argument skills, an appreciation for poetry and literature, a little bit about the Spanish language, and college credit for a lot of this (never had to take freshman comp, general biology, american history, and I also had two semesters of Computer Science down). I can come up with examples of holes in my education too, but honestly, with a bit of better counseling from somebody or a better internal compass, I could have *easily* gotten a lot more out of the whole thing -- there was simply a lot stuff on the table that I just left there. All from a state (Utah) that tends to lag in per pupil spending.
The school I did my student teaching had at least that much to offer. Problems, yes, not necessarily the apogee, but pretty good.
Yes, of course there are districts and schools and individuals out there in deeper trouble than I'm describing... enough that reform is a worthy problem. But this idea that it's all broken top to bottom seems fishy to me, and I think it's driven more by a subtle antipathy than actual analysis.
A HS teacher should have at least an MS in the field they teach and not in education.
Credentialism isn't going to save us from any of our current problems. In fact, we probably need less of it: slightly lower barriers to getting into the profession, better evaluation of those already involved.
But even if we were talking about more subtle solutions, a subject-and-practice focused undegrad (augmented with some light pedagogical theory) is going to be as helpful as tacking on an extra two years of study, particularly for the better candidates.
On the teaching side HS should be more like college and less like grade school
Oh, certainly. Probably most importantly in having more time for teachers to refine and practice their subject matter and less time on per-se prep and teaching. Of course, that's going to cost us, particularly if we're also increasing the professionalization of teachers (and compensating accordingly).