Antonyms for the term "sang praises" include derogated, criticized, condemned, denigrated, disparaged, maligned, disapproved, censured, blamed, and rebuked. These words indicate a negative connotation and signify the opposite of praising someone or something. When you criticize or condemn, you are pointing out faults and flaws instead of highlighting the strengths and achievements. Disapproving or blaming someone means that you are unhappy with their actions or decisions. Using these antonyms in place of "sang praises" can change the tone of a statement significantly, implying criticism or disapproval, rather than admiration or appreciation.