Why does everyone think Laurie is being left out?

I've seen a lot of people say they've felt like a Laurie in their past friendships because they've been left out of a trio, but to me it seems like all 3 girls are just the same level of toxic... The only reason people feel bad for Laurie is because she cried in that one scene. But Laurie gossiped with both Jaclyn and Kate, so I don't really get why the audience views her as a victim, they are all horrible 💀