Antonyms for the phrase "sticked up for" could include "criticized," "condemned," or "disagreed with." These antonyms suggest a lack of support or defense for a particular idea or individual, instead expressing opposition or disapproval. Other antonyms could include "ignored," "neglected," or "doubted," indicating a disregard or lack of consideration for the subject matter in question. While "sticked up for" connotes a sense of advocacy and loyalty, these antonyms express a more critical and detached perspective. It is important to consider opposing viewpoints in order to gain a well-rounded understanding of a particular topic or situation.