I call dudes bros when they disappoint me for applying cultural stereotypes of masculinity too heavily and seemingly inauthentically for my tastes: and for expecting that from other people who identify as male.
One time a humanities professor disappointed me because she really liked Sister Act (1992). I had believed she and I saw the world the same way.
One of my ex-girlfriends had an entire family of basics (men and women), and I felt really misunderstood.
Generally I want people to be interesting to me, and to understand me and my tastes.
Aside from this response, I’ve never used the word “basic” in this manner to describe someone, and I’ll go back not using it now.
It is more important to me to recognize not feeling understood in myself than to shame the people who I believe do not understand my cultural preferences.