I am younger than the Sensei, and our relationship is strictly student and teacher. We don't speak casually or personally to each other. We are not BFFs. I would call it more of a professional relationship if any.
Here is, imo, the root of your problem.
Unless you are a formal deshi in a real koryu bujutsu dojo, you performed keppan, gave your body and soul to the clan/ryu, et c (as if you signed for the French Foreign Legion or USMC) you are a customer of a commodified leisure provider.
Sensei changed the product/service he sells and this new product/service doesn't satisfy your needs. Go buy in another place. There no need to make it personal, it is only business.