Staying with a partner you dislike this much is emotionally abusive

Will’s behavior towards Emmy at this point is emotionally abusive and he clearly is not interested in being her partner, supporting her, OR being emotionally available for her. Cast members expressed they’ve SEEN AND HEARD HIM cheat, call her “anorexic,” disparage her character, call her boring and be horribly disrespectful. We’ve seen with our own eyes his eagerness to abandon her during moments of emotional distress and egg on people who are trying to attack her. What are his motivations for staying in this relationship?? Why stay when you talk so much shit about her and cheat on her and gaslight her? Does he enjoy the control and watching her worship him while he treats her so horribly? This toxic relationship has crossed the line into something much more sinister imo