I don't think delivery truck drivers work for the actual McDonald's company, but I could be wrong. I think you should call McDonald's general office and ask where you can complain about that situation, it's basically out of the actual restaurant's hands,even if a manager asks the delivery truck driver to move it may not be possible or the driver may choose not to listen. It can also really depend on the design of the parking lot,which is not the driver's fault. If there's no where else to park,how else would they be able to deliver the product to keep up with customer demand? Without delivered supply, there will be no burgers, no drinks, no fries,the list goes on.Sure it is a temporary inconvenience,and you have every right to be annoyed by the inconvenience, but it will benefit you and other customers in the long run.