Totally unrelated to mental health but what is your take on the 5-star rating system?

I just got blasted by my car dealership for awarding them 3 and 4 stars for what I felt was an expected service experience. They met my standards and that is that.

In my book, 5-stars is reserved for an experience that goes above and beyond my expectations. It must wow me and be memorable. Merely meeting the standard expected does not fit this criteria.

Thoughts? Should my auto-service department have even called me? Ought they to be even tracking who completes their surveys and responses to begin with? Isn't this a privacy issue?