The phrase "are given due" typically means that something is given the appropriate amount of attention or consideration that it deserves. Antonyms for this phrase would, therefore, suggest that something is not given the appropriate attention or consideration. Some possible antonyms for "are given due" are "are neglected," "are dismissed," "are overlooked," or "are disregarded." These terms suggest that whatever is being discussed is not given the attention or importance that it merits, and may imply that an injustice or oversight is occurring. It is important to consider the context in which these terms are used, however, to understand their full meaning.