Minding your own business at work should be a simple and painless task unless you're a Karen, or being targeted by one. In this case, an employee (who we'll call Karen) made everything her business, blaming everyone else for her own mistakes, and ensuring her coworkers were as miserable as she was. One of these coworkers was OP, who had a personal vendetta against Karen from multiple unpleasant past experiences. The company they were working at was an insurance company, and OP's job was to coor…