Schools can change with every little movement, or they can stay static for 20 years, but without analysis and application to the students' lives, it makes no difference. One could say that plumbers have to put up with a lot of junk and gunk. But an excellent plumber knows how to work with the junk and gunk, and more importantly, doesn't mind working with them. Yes, many teachers see these things as nasty and gross and something they have to deal with. But if they would stop and look at each individual part, they would realize that each component in itself is not bad.
Good plumbers know how to deal with hair clogs versus food clogs.
It is also helpful to acknowledge the good as well as the bad. Parents don't just want to hear about the shortcomings of their child, they want to know the positives as well. Also, excellent teachers are not only able to identify the strengths of administrators and school boards, they are able to identify weaknesses and offer possible solutions. As a student teacher, I saw many teachers who spoke negatively about their administration, and then sat back and did nothing. I find it almost hypocritical to complain and then do nothing.