Theres no one that hated their employer more than I hated my previous employer. And as bad as I wanted to tell them how awful they were as employers and human excrement, I chose to spend a month making myself irreplaceable, then just sent a text on a Monday morning saying "I quit" with no explanation, and at the worst possible time of the year for them. And never returned any of their dozens of calls or messages. With the job market such as it was two years ago, when I interviewed for my current job, they hired me on the spot. Wow, been here for two years already? I have to imagine they checked my references, though I never asked.