It's not quite that simple. Remember, she's not simply doing this because she wants to: she's doing it because "sensei", the woman who "saved" her and whom she feels indebted to, commanded her to do it. It's not just that she has her own problems; it's that Ice-chan provided assistance that on the surface helped but in the process indoctrinated her into a toxic, volatile mindset.
You could think of it as a lesser form of radicalization, or even cult recruitment. Ice-chan found her when she was at a low point, powerless and vulnerable, and then provided her a solution; "Men are all pigs who will lust after and take advantage of you. Use them, manipulate them, make them dance in the palm of your hand." It "helped" Nosfera, but only on a surface level; she's clearly successful, but she's not happy.
And if the implications at the end of this chapter are what I think they are, Nosfera wasn't actually disgusted or angry at Ganoff. Rather, his sincerity runs counter to everything she's been taught. The teachings that "saved" her and made her successful. And, as is painfully realistic, when exposed to something that disproves her viewpoint and the teachings that she's lived by up until this point, she lashed out with violence. So the goal will be to get through to her and break her out of that toxic mindset.