Burger King review: service time for waiting for food including ordering

I went to BK on 2-1-20, at 4:54PM to purchase two double cheese burgers at the drive-thru. I was told to hold my order. I set there for 15 minutes at the speaker, and no one ever came back to take my order. I went inside, and it took approx. another 15 minutes to order, and receive my two burgers. There were only 3 people including the manager working in the restaurant. There had been no one in the drive-thru lane, and only one person in the dining area. There were only 3 people in line in the cashier line. I felt this was unacceptable, I did not bring this complaint to the manager's attention because he acted as if he was rushing to fill orders. I go to this BK at least once a week, or more. I was very disatified with the time it took me to obtain my two burgers. Three people on duty at BK- the cook, a cashier, and a manager seems to be an improper way to conduct a restaurant. I enjoy eating at BK, but if this continues, I will eat somewhere else. Thank You.