Oh yes, Mishap! I retired a few years ago from an "outstanding" comprehensive school, which was outstanding because it was and was recognised as such. But we still spent a lot of precious time to be able to show the inspectors what we already knew about our school. And that, in itself, is no bad thing, since we had to examine the intricacies of what we did, and be honest. However, the public perception of the OfSTED pronouncements governs the success of a school in attracting students, or not, so the "winners" win, and the others are seen as failing, which puts them in an invidious position.
Two of my three DC teach; one is a Deputy Head, the other a senior English teacher; one DiL is a SENCO - all in big (and not all "successful) comprehensive schools. I hear them talk about box ticking, priority setting, etc.etc. and am, despite all this, happy to see that they (mainly) have the same joy in teaching that I had. But it is SO hard.