I am a frequent delivery orderer. Whenever I order from this restaurant, an old somewhat physically inable man brings the food to the door which takes FOREVER. Watching him moving slowly in front of my eyes is just painful. I've ran to his car a few times.
The purpose of the delivery is to receive my food AT THE (front) DOOR. Not to run out of my apartment building to get food; I would rather go pick it up for myself.
Their food doesn't worth paying the same percentage of tip to the driver as for waiter service at the restaurant, and to run out to their car to get my food.