There are other airports with similar sort of problems. It is caused by traffic surges on certain days of the week and times of the day. Simplifying the explanation, aircraft utilization and ground transfer logistics dictates that flights by one or more operators will be scheduled to arrive/depart on specific days and around the same times. It creates traffic waves. Find a schedule outside these waves and you will waltz through. I for one avoid flying to holiday destinations Friday noon to Sunday evenings. Try and find a schedule which goes against the general flow at a particular time of day. Of course a lot depends on if you're willing to do some homework, pay more for your ticket and have the flexibility to choose your day of travel.