_Cosmoss__'s journey

I've been working at a local sandwich shop for three years now, starting as my first job right out of high school. For the past two years, I've been full-time, and recently I took on a part-time job while attending university. I'm planning to quit my current job because the environment has become unbearable, despite knowing that the place relies heavily on me. The manager is rarely present and spends most of his time in the office, leaving me and a few others to handle everything. He lacks the knowledge to train new staff and often threatens pay cuts for minor mistakes, which is illegal. I’ve had to step in to improve food safety practices, as nobody else cared to do so, and I even reported the place for failing health standards. Maintenance is practically non-existent, and I’ve been trying to fix things myself, but it’s exhausting. Recently, head office introduced new menu items while cutting our budget, which means more work for less time. I know the ins and outs of this place and often fix issues that others overlook. My manager has relied on me to manage tasks he doesn’t understand, and I’ve been praised for my hard work. It’s hard to leave because I genuinely feel valued, and I know my departure will create a significant gap. However, I can't keep holding everything together without any authority. I’m ready to move on, but I need to find a way to be okay with leaving behind my coworkers and the sense of confidence I’ve built here. I know my boss will likely make me feel guilty about leaving, but I have to prioritize my own well-being.