It used to make me irrationally angry as well, but at some point in the past few years I’ve tried to stop letting things that happen in public get to me. My expectations are so low and the effort I put out anymore is even lower. When I’m out and about in public I try my best to keep to myself and ignore anything that isn’t gonna directly affect me.

Maybe this is a selfish way to go about it, but it is what it is. Being courteous doesn’t really benefit me in public most of the time. I’m not an outright dick to total strangers, I just don’t try very hard to be overly friendly.