The way it was entangled into the narrative. The director was inspired by 70s Hammer horror and gialli (and even Hitchcock), but tried to twist them so that she can fit her feminist worldview into it. The problem is these two are like chalk and cheese. The eponymous Love Witch is a dominant female who dominates the patriarchy and denudes men's "weaknesses". She's okay with leaving a guy for death or even killing him. This is pretty okayish, but throughout the film there were these sitcom-level feminist remarks/cues in dialogues (and some parts felt like Sabrina, the Teenage Witch-level fare) that I sadly cannot remember anymore that felt really cringy. All in all, the witch turns out to be a monster, an unfulfilled woman that feels like taking revenge of all men - perhaps an accurate depiction of radical feminists. :P
I have one query - the director tried to twist in her worldview. Ummm, is this not something artists do?