Here's a little something that might help you figure out why the customers are unhappy based on where it is that they become unhappy on their standard route of enter-register-table-exit.
- If they're unhappy at the door = register issue
Register facing wrong way or no clear path to register- If they're unhappy at the register = there's an issue with seating/tables
No clear path for customers to get to the empty seats available, not enough empty seating available- If they're unhappy at the table = food issue
Try serving more of the older recipes that have a long timer and higher yields
You can check the Recipe Guide (link in my signature) to see recipes that offer most plates
Never block your doors, it may inadvertently cause a Quick Sale which can cause all your food to sell at once