Antonyms for the phrase "was given due" include disrespected, overlooked, ignored, neglected, marginalized, dismissed, and disregarded. When someone is disrespected, they are treated with disrespect, disdain, or contempt. They may be dismissed, ignored, or disregarded. Overlooked individuals are often excluded from opportunities or ignored in social and professional situations. People who are marginalized are often excluded from society, and neglected individuals are often overlooked and ignored. These antonyms represent a lack of acknowledgement or appreciation for someone's contribution or worth, and they are the opposite of being given due respect, recognition, or appreciation.