You are making a lot of negative assumptions about girls you do not know. To me, this looks like a funny spin on the "omg look I'm engaged photo" (which there's nothing wrong with, by the way, even though you claim it's for attention. What's wrong with that? Sometimes things happen to people and you want to share. So what), where four friends happen to be engaged at once except one, so they're taking a silly photo they all agree to be in.

Your thinking smacks of misogyny in that you're assuming that all of these girls are being horrible to each other because of some stupid assumption society has about that being "just how groups of women are". It's not true, and it's stupid.