circle the drain
To be in a state of severe deterioration such that one is approaching inevitable ruin, failure, or death. Usually used in the continuous form. The company's closure was inevitable, as it has been circling the drain for the last six months. Her political career began to circle the drain after news of her affair came to public light. He was already circling the drain when the decision was made to take him off life support.
circling (the drain)
tv. & in. to be in the final process of dying; to be in extremis. (Jocular but crude hospital jargon.) Get Mrs. Smith’s son on the phone. She’s circling the drain.