One of my most upsetting college experiences was when I saw a group of girls wearing merch of one of my interests in class, but when I tried to compliment them on the merch and say I'm into that too they completely ignored me
I tried a couple times on different days because I thought maybe they didn't hear me. Nope. Completely ignored. They'd talk about it in class and everything but they were so repulsed by me they just ignored me