Antonyms for the word "more bad mannered" can be "well-mannered", "polite", "considerate", "respectful", "courteous", "gracious" and "thoughtful." These words convey a sense of politeness, kindness, and empathy towards others, which is the opposite of bad manners. In today's society, it is important to have good manners as they help to build strong and lasting relationships, whether in personal or professional settings. Bad manners can not only be off-putting but can also lead to misunderstandings and conflict. Therefore, practicing good manners is the key to creating a positive and harmonious environment in all aspects of life.