I'm so full

I'm seriously fed up with Walmart. I'm actually thinking of leaving. Been stuck at this jo^^t for nearly three freakin' years now, part-timing it 'cause I gotta hit up college full-time. Just need a bit of cash on the side, you know? But my boss, man, she's on my case. Keeps scheduling me during my college hours. My usual shift's 7 AM to 3 PM, then I gotta hustle to class from 5 to 7 PM. But nope, she's throwing me closing shifts, like 1:30 PM to 10 PM. I've told her a million times I can't do that. Feels like I'm talking to a wall. Even set my availability clear as day: 7 to 3. Talked to the big cheese too, but he's just passing the buck back to her. "Figure it out," he says. Well, guess what? I'mma figure out how to quit. Maybe on my next day off, I'll stroll in, drop my vest, and bounce. Tried talking to her directly, seeing if we could work something out, but she ain't budging. It's like ba^^^^g your head against a brick wall, man.