In all fairness, there are also some very good teachers working very hard -- but, truly, in other situations, one must have a very high threshold for working with very incompetent people in education. If you don't have that ability to put up with A LOT OF CRAP, better to leave it to those jerks who run the system, because they will never quit their jobs, no matter what. Either you have to get stressed out and lose your health, or find a way to pretend that all that you see and experience is just a mirage in certain situations. (And, some people are better at pretending than others!)
Ironically, I remember, as a member of the PTA Council in our area, having to fight to Have a "Teacher of the Year" award. The older, tenured teachers said, "ALL teachers are teachers of the year." Well, no. Many were substandard and fought the idea of being compared with each other.