I am genuinely so confused about this Meredith/Angie/Britani conflict…

Ok, so let me get this straight. Britani gets mad at Angie for GIFTING her a bottle of wine. Angie responds with a joke that she’s with 3 guys at once (in which Britani literally told that to Angie verbatim at a lunch). Britani proceeds to call Angie a slut FIRST. Angie responds with a funny comment about Britani’s hair…..and Meredith immediately kicks her out????? I’m sorry but Angie is nowhere even near in the wrong here. Meredith hates her for no reason and Britani called her a slut before Angie even started with her. I don’t understand how anyone could see it differently