The term "rates highly" implies that someone or something is viewed with admiration, respect, and appreciation. However, antonyms for this phrase are generally used to describe individuals or groups that are considered the opposite of admirable or praiseworthy. Some antonyms for rates highly may include "despises," "dislikes," "scorns," "disrespects," "disparages," "criticizes," "condemns," or "rejects." These words signify negative evaluations given by someone who holds a contrasting opinion to what is considered as deserving of high ratings. It's essential to keep in mind that antonyms for "rates highly" are subjective, which means that people differ in their opinions and standards of what's considered admirable or worthy of praise.