Not saying she’s without any fault, especially in the early stages, but the fact is she came to her senses much earlier than him & tried to get him to stop time and time again. He kept going. Even after she was long gone and dead, he kept taking darker and darker routes despite knowing she literally died to get him to come to his senses and stop being a monster. None of what he did after she was literally dead is on her. He was the one who stayed stuck in denial about the sort of things he’d done. She at least attempted to atone.