We have different opinion and if that's how you feel then it obviously is not sexism then.
I am not sure how it's disrespectful. If the annoying and stupid part comes from the popular culture use of "bro" in movie and street, well maybe it's the environment the person is in. I have met a girl from another country and whoever she talks to she would address the person as sir or madam. It sounds respectful but after a while it sounds annoying and stupid because she can just call the person Mr. X or Mrs. X.
