I suspect a number of both pilots and controllers will argue that civility on frequency is of minor importance. They might suggest that competence and brevity are more important, so "get over it".
I agree with you, however. As a 35+ year veteran controller, I never once talked to an airplane. I always spoke with pilots - fellow human beings who always responded in kind to a courteous remark. When we fail to be civil, we are not as good at our jobs as we might be.