It sucks that you encountered such a disturbed young woman. She does appear to have men issues but I'm not sure how her mentally disturbed state of mind is linked to your distaste in feminism. I'm sure you're bright enough to look up the definition of feminism yourself so I won't get into that here. I knew a girl who would act similar to the girl you have posted about but she did not identify at all as a feminist. Disturbed behaviour is disturbed behaviour. It goes deeper than feminist views.
"Yes, I am a Free Lover. I have an inalienable, constitutional and natural right to love whom I may, to love as long or as short a period as I can; to change that love every day if I please, and with that right neither you nor any law you can frame have any right to interfere. And I have the further right to demand a free and unrestricted exercise of that right, and it is your duty not only to accord it, but as a community, to see I am protected in it. I trust that I am fully understood, for I mean just that, and nothing else."
— Victoria Woodhull, “And the truth shall make you free,” a speech on the principles of social freedom, 1871
— Victoria Woodhull, “And the truth shall make you free,” a speech on the principles of social freedom, 1871