Bartender shamed me in front of other customers for not tipping

Came home for winter break from uni so my first time at a small town bar and not a college bar. When I came I got a glass of wine and when buying my second about an hour later she asked “are you gunna tip at the end or what because we’re gunna stop serving you if you don’t tip” I just handed her the $4 in my hand because I didn’t know how to respond. Is this normal? This is lowkey ridiculous. All she did was pour my drink into a plastic cup. It’s wine so she didn’t even have to make anything. Should this be an aita post? Should I have told her to get a real job? Sorry if grammar is bad. Typing this as soon as I got home.

EDIT: saying “get a real job” is a joke. Guess I should have added the /s

EDIT again: after checking the yelp this bar does not exactly have 5 star reviews about service

ALSO: to make you remember this is after ordering my SECOND drink over the course of an hour. It was not like I was hammering shots and then leaving her to hang. I still tipped $4 for two drinks so while I may be mad at the custom I still participated.