If your ex-girlfriend is in a situation where the new boy is being mean to her, it’s important for her to consider her well-being. Relationships should be based on mutual respect, kindness, and support. If she feels disrespected, hurt, or unhappy, those are signs that she should seriously evaluate the relationship.
Encourage her to reflect on how she feels and to consider talking to someone she trusts about the situation. Ultimately, the decision to break up is hers, but reminding her of her worth and the importance of being treated well can be helpful. If she decides to end the relationship, she should know that it's okay to prioritize her own happiness and mental health.