Reminds me of communications I have recieved as well, "call with any questions", etc. and then when I do, there is no response.
I think in such situations it is ideal to get out of the toxic environment, but if there are no better options, you are kind of stuck and have to make the best of it. It makes me sad though, that this type of thing happens all the time and these toxic school districts basically "win", because the parent is unable to fight them. You have to do what is best for yourself and your family though. I didn't really win either, when I tried to take them on. We ended up switching schools. I did feel better, though, in that maybe my complaining made it a little better for the next person in line. Maybe at least one person, in the mess, thought about some things and the negative effects of all the stupidity. Then again, maybe not. Maybe no one thinks about any of this at all.
Glad to hear that you are seeing some improvements and feel better about how things are going.