Been there, done that. If you can push through the next couple of years the grass gets greener. I took over a similar situation where the long-time band director had seen a decline in the program before he retired. The principal made it clear in the interview that he wanted some changes made. The kids, parents, and even some of the other band staff pushed back hard on standards and accountability. We had a couple of rough years but now we're building a streak of 1st division ratings, finals appearances at marching contest, Region and State kids, and all the other markers of a great program. The culture situation got a little better every year. Some kids graduated out, some left, some were pushed. I had to get a middle school director "reassigned" for their disparaging comments on a group chat with parents. I still have a few parents who remember the "old band director" and want to talk about me on group chat, but at this point they're outnumbered by parents who appreciate high standards for musical performance and student character.

By year 5 the HS kids didn't know any different. By year 8 nobody remembered the previous director except for a few younger siblings. I'm on year 10 now and life is good.