Pilgrims receive the Compostela certificate for the pilgrimage if they walk at least 100 km to Santiago, and that means starting in Sarria, so the last 100 km are overcrowded with people who have got only few days or do not want to walk any longer than 100 km. The result is, you will see
big crowds
people who are poorly equipped/prepared for such a long walk and suffer a lot
people rushing to catch a bed
people taking taxis and buses instead of walking
taxis and vans ferrying rucksacks from town to town
large groups walking together
the intimate atmosphere that you find say, in the Meseta, vanishes completely and you just have the feeling you are a fish in a bath tub and somebody has removed the plug and the water pulls everyone down the drain.
It can be frustrating when you are long distance pilgrim...