McDonald’s complaint: Service has Only Gotten Worse

We’ve been customers for a number of years to this location specifically, consistently ordering the same menu items. Over the past few months, we noticed that our orders were incorrect almost every time.
On one of our most recent visits, regarding the Filet o’ Fish sandwich, the tartar sauce we requested extra of was completely nonexistent. The lettuce that is supposed to come on the sandwich, was coating the insides of the box and brown on the edges. Our fries tasted freezer burnt and like old oil, as well as having no salt. When we tried to inform the staff, we received another order of fries which tasted the exact same.
Since this location is local to our area, we’ve noticed that there seem to be two different teams of people who work on certain days. When one team is working, the food comes out quickly and tastes great with minimal mix-ups. When the other team is working–other customers, especially those who dine inside, will be in lines waiting to receive correct versions of their orders.
Customer service is also minimally available, even when attempting to contact the owners.
It’s a shame that I’m even needing to write this, but it’s important others are aware of the downhill trend in quality from this location.