hatchet job
From Longman Dictionary of Contemporary Englishhatchet jobˈhatchet ˌjob noun [countable] British English informal CRITICIZEa newspaper article, television programme etc that criticizes someone severely and unfairlyhatchet job on They were afraid I was going to do a hatchet job on them.Examples from the Corpushatchet job• He devotes several paragraphs to a hatchet job.