Promotions at work can leave a bittersweet aftertaste in your mouth; on the one hand, your financial situation improves along with your increase in salary, but on the other hand, your coworkers may develop a deep disdain towards you overnight. In this case, OP got promoted to being in charge of daily operations at a small municipal department they both worked at, and a Karen employee didn't take kindly to OP's new position. Karen was the type of obnoxious employee who complained that she was th…