I am a product of private school education all the way from 1st grade through College. Tomorrow begins my 34th year teaching in a public school classroom. I live in the community where I teach, and my own 2 children graduated from the school where I teach. In fact, we moved to this community in large part for the schools. Suffice it to say I have seen a lot through the years good, bad, and ugly. I know of public schools that are fantastic (like the one I am part of) and I know of public schools that are a hot mess. I know of private schools that are fantastic, and I know of private schools that are well below par. There are so many factors and moving parts...finances, leadership, community values, home life, etc... that contribute to the well being of a school district that it is difficult to make sweeping generalizations. Much of Jayrod's description of his wife's situation could probably be echoed for my district as well. The school leadership values the staff. Good teaching involves creating the conditions for student learning to happen. Similarly, good administration creates the conditions and culture for teachers to accomplish that goal. Don't underestimate the power of good leadership.
Are public schools getting worse? In some ways, I am sure they are. Although I am part of a great district we are not without problems. I see the things that people have discussed in this thread like grade inflation, overcrowding, lack of student accountability in my school as well. We are not immune. But in some ways schools have gotten better over the years. There is greater emphasis of the process of learning, giving students voice in their learning, individualized instruction designed to target student needs, systems of intervention to support learning, emphasis on collaboration, empathy, resilience, and critical thinking rather than grades etc...