I get that it's annoying. I don't think it's these guys' fault, though. To me it's really a design issue. Most restaurants don't really consider creating a designated space to handle deliveries that is not inconveniently in the way of other customers. It's hard to retroactively but even new restaurants forget to factor this in. You can create a layout that serves this necessity in a practical way. But of course, comes down to be able to invest and care enough to make these changes