I'm a cook, and I work the main station on the front line. I'm responsible to not only deal with the three ovens and the heaps of food constantly going through, but to call for all orders, any 911 orders, toast (sure, doesn't sound difficult, but having to listen to twenty plus people constantly asking "Is there toast in?" or "Can you put the toast in the warmer?" is incredibly annoying), and deal with the managers, waitresses, take-out/delivery, and expo. It's probably the most frustrating station, or position to work during a rush.
Unfortunately, I rely on other people to do my job well and efficiently. But I'm surrounded by people who simply don't get it. They have shown no signs of improvement over several months, have no motivation to improve, don't care about their job and responsibilities, or don't respect their fellow co-workers. It's incredibly frustrating to have to deal with all the drama of other people to get through a shift.
Another huge pet peeve is when people complain when they are asked to do their job. I'm so sick of all the teenagers whining about having to do something, instead of leaning against the counter all night. I'm not a slave driver, but I do expect people to do the bare minimum, y'know, the job requirements.