Kudos to you for that. I think it would behoove all of us 'former students' to be careful in criticizing those that helped us get where we are, wherever that is. I hated, not too strong a word, the parochial school I attended 1-6. I loved kindergarten, jr. high, both public. I hated high school, but not because of the teachers as much as social, though I did well, academically, despite missing over 200 days in 4 years.

(Tells you something).
Indeed I think that the vast majority of teachers are very caring, even inspirational to their students. I'd bet the average person gets through k-12 with 3 'bad' teachers. Not good, but considering what the job is, even those 3 may have just been a personality clash, the child still learns. I would guess that the average student is lucky to have exceptional teachers 3-5 times during those years. With that said, to the individual student, those may be one of their 3 'bad' teachers. So much is interaction and style of the learner and teacher imperative to perception.
Oh I'm certain there are school districts where the bad are too common, but it's not the norm. Even in the worst of areas, motivated students succeed way beyond the expectations. So much of education is the child's ability and attitude. The teacher and their flexibility and empathy, the administration and the support available to both the student and teacher.
Rambling, perhaps. It's important, whether a student, parent, teacher, or citizen. 'Our children are our future.'