I was initially the only graphic designer hired for creating designs to be imprinted on brushes for a large manufacturer, they had recently been chosen as the only one to receive one of the nation's largest toothbrush company's outsourced printing orders. Job was pretty decent, steady but not overwhelming even as more and more type of brushes started coming in... but they went ahead and hired a second designer anyway (at the same pay rate as myself, despite no degree and no experience in the past ten years) to prepare for what they planned to be a huge influx as the final SKUs started coming to them and nowhere else.

Started out training him to do what I'd been doing for those jobs, but I continued doing all the other design projects for the other plants on my own and just had him helping with those new orders. I noticed (and was told by others who walked through and could see his computer screen) that he was on Facebook and listening to music all day and rarely working on designs. I streamed Spotify through my FB account, so that part didn't bother me, but he brought his own hard drive to listen to his ripped music, so was constantly flipping through albums looking for something to listen to. Mentioned it to management and they pulled internet history, without investigating it further, so it showed FB and Spotify on my account, and I was chewed out more than him since his was on an external drive.

Then started noticing how many designs I was doing versus the total orders coming in, plus taking over some other duties when team leads were out, and also myself being the only one training for the new, huge digital printer that came into the plant. Started keeping up with every single thing I did throughout the day, as well as what he did since I was handing him new stacks of orders each time he finished what he'd started. Sent these numbers to three different level supervisors, first my team lead, then plant manager, then the (I think) VP - it's been long enough I can't remember what his exact title was, but that was basically his duty. Nothing was done. Multiple meetings, being -literally- cussed by my direct supervisor in front of everyone on the floor in that plant, no actions taken.

One day, the other designer was in a bad mood and I called him out on not doing even close to his share of the work, and he proceeded to cuss me as well. So... I cleared out my desk drawers a little at a time when no one was looking that day. That night, I sent an email with all those numbers from the past month attached to it, and copied to HR, the VP, Pres, all supervisors, and anyone else who had an email listed that I could find. I told them that I was sure they would be fine without me if the other designer was even half as competent as they seemed to believe him to be.

I never received any response other than a termination letter showing that I had quit and no longer had insurance through the company.