It's entirely up to you to do something about it, really. With the attitude you have, i doubt anyone is forcing you to look at their selfies. It's either you just let it pass or you block/unfriend the people in your social network stuff who post selfies. selfies aren't about vanity, it's a reflection of a person's mood and general thoughts in the time it was taken, it's a record. if you think about it, humans have been taking records of anything (cave paintings, graffiti, oil paintings, early photography). it's just a matter of perspective. so, to be quite honest, i don't think it's the "selfie" in itself that brings out this anger in you, but something else...
good day