re: Does any dealership in the world have a “good” service department?

Our local Buick dealer was excellent when my in laws were ill and befuddled. My FIL was especially bad off and had backed into a tree at the local Crispy Cream (He was an ex-cop, so it was expected). His wife was going down hill rapidly. The car was at the Buick dealer for body work and, at our request, they explained to him that certain parts were going to be slow arriving and they'd have to keep his car for three more weeks.
By the time the car was 'ready', he was a bit more grounded.

I considered that excellent service.