Everything you said is spot-on except this part. Sure, some girls did like him being edgy. But Anisa wasn't one of them. She has a history of being a skin walker and copies whatever is trendy at the moment. Before Ian, she had a sports obsession for a time, for instance.
What actually happened is that Anisa was coming from a failed tit streamer "career." Edginess was in vogue, and Ian just happened to be an easy target. But make no mistake, Anisa is into whatever is popular at the time. Previously, she was edgy, and even before that, she was all about self-help. Nowadays, she is all about woke politics because she is that hollow, and that's what's trendy at the moment.