This McDonald's is one of the locations who have not revamped their look to the modern age look. Their drive thru line up is always long and tight. Try your best to not use a coupon with the drive thru as they are not trained well enough to handle an order of that magnitude. It's not hard to say you have a 2-can-dine coupon but I guess too much to handle.
On top of that they like to drop the food when handing it to you through the window. Add in being rushed to go to work in the morning and you're day is already a crap show.
Don't expect much.