With that said, why do you want to work for a district that does not care to make reasonable accommodations to ensure you can do your job in a healthy manner? Yes, you could absolutely "lawyer up," and you probably could get somewhere with it. However, at what cost?
The fact is, you should always use informal methods to resolve workplace issues unless there is something verifiable and illegal going on. If it's that important to you, of course, schedule to meet with the supervisor(s) of those that are the cause of this. If that's the superintendent, go forth.
The problem is, you need your administrators for references about 75% of the time (or more) if you're going for a head gig. If it's an assistant, maybe not as much. I watched one of the best band directors in the state get blackballed for two years over an administration with an ax to grind. It is a delicate process to voice grievances in a manner that keeps or earns their respect.
Again, if you are unhappy, I recommend finding a place to work for that truly cares about its people. Those places are out there if you choose to seek them out. With the teacher shortage getting worse, I expect more districts to come around soon.