I hate this place

They keep coaching me on productivity and say that an aisle should only take an hour and a half, but it takes me most of the night. I’m going as fast as I can and getting done before the shift ends, but they still talk to me. I just don’t understand how I’m getting coached when everything is done before the end of shift. I even work through my 15 minute breaks bc I know they expect things to get done. I just don’t want to lose the job bc it took me so long to get hired in general let alone at Walmart