I started a temp-to-hire position at a factory last week through a staffing agency. I had my first day of training yesterday, and it was on what I was told is the most challenging spot on the assembly line. Today, I was thrown into the role on my own. Unfortunately, I faced a lot of hostility from a coworker who was constantly berating me for not working fast enough. It was incredibly frustrating because I was trying my best, but I felt overwhelmed trying to keep up with someone who had been doing the job for months. After today, I've decided not to return tomorrow and to end my assignment. I'm contemplating whether I should inform the staffing agency about the situation and the specific person who made my experience so negative. Part of me wants to just walk away and forget it, but I also feel like I might not be the only one who has faced this kind of treatment. I want to be professional about it, but I'm unsure how to communicate my reasons for leaving without burning bridges. I know I might need the agency again in the future, so I want to handle this carefully.