Poor and slow service

Hi One of my pet dislikes is slow service at a fast food joint. Burger King appear to rather good at providing poor service. Being a burger addict I do like their burgers but their service is consistently very slow. I blame management as staff have a tendency to be rather slack when management is away. 3 people in the queue ,6 people behind the counter and it took 15 minutes. What to do Burger King Blue Route ?