Well, it's easy to understand. I was in basically the exact same position she's in the first time I saw that story on the old S_D; I didn't know Carol or the Avengers from Adam, really, and just from that one narrative I could happily have punched the whole team senseless. Now that I'm actually familiar with her and invested in her as a character, that story is shaking rage and this - an angry but composed, tightly controlled lecture, which nobody but Wanda even seems to react that guiltily to, and an impersonal mention of Marcus' eventual death - is... not enough.