When it comes to describing something that seems to be never-ending and painful, the phrase "prolong the agony" might come to mind. However, there are many other synonyms and phrases that can convey this same feeling. Some options include "drag it out," "make it last," "extend the suffering," "needlessly prolong," "draw it out," "stretch it out," and "keep the pain going." These phrases can be used to describe anything from a frustrating meeting that seems to never end, to a difficult situation or relationship that just won't improve. Regardless of the scenario, these synonyms all capture the essence of the frustrating experience of "prolonging the agony".