The opposite of "rave over" can be expressed in terms of criticism or negative feedback. Antonyms for the term include words such as condemn, denounce, disapprove of, criticize, and revile. These words are useful when describing a situation that is disliked, disapproved of, or considered inappropriate. They provide an effective way of conveying the opposite meaning of "rave over," which typically implies praise or admiration. It is important to note that antonyms for "rave over" can have varying degrees of intensity, depending on the context in which they are used. In general, however, they carry a negative connotation and serve to express disapproval or condemnation.