The interesting thing about waitstaff is that they can’t say anything when (general) you do something inappropriate, rude, or worse.
Some people respond well to this kind of environment. They intuitively know how they’d like to be treated if the tables were turned, and they treat everyone with kindness.
Are there times when it’s appropriate to complain or feel angry? Of course.
But when they become a predictable part of dining out with someone you think you know, beware.
This person is showing you their true colours.