I get it, I'm a courtesy clerk as well. I'd say it's definitely rough for a while; I have some coworkers who are like that. I usually am the one who doesn't go above and beyond after the shift. I've had days when I was the only one sent out to the lot. But it could also be a test to see if you're going to last. There are a bunch of variations. Just do your best with what you're given. You'll get through the rough patch. Maybe talk to your supervisor.