No, it is not accurate to say that all girls leave boys when they find someone better in a relationship. Relationship dynamics are complex and can vary greatly from one individual to another. People's decisions about their relationships are influenced by numerous factors such as personal values, emotional connections, communication, compatibility, and individual circumstances.
In any relationship, regardless of gender, there is no universal behavior or outcome. Some people may decide to end a relationship if they find someone they feel more compatible with or if they encounter serious issues with their current partner. Others may choose to work through their differences and remain committed to their current partner.
It's essential to avoid making sweeping generalizations about how people behave in relationships based on gender stereotypes. Each person's actions are unique to their own experiences, desires, and choices. It's important to treat individuals as individuals and not make assumptions based on gender. Communication and understanding are crucial in any relationship, and open dialogue can lead to healthier and more fulfilling connections between partners.