3rd aniversary

Today I had a part time job and the 3rd aniversary took place there.
I had to go to the store earlier and worked very very hard.
My position is a cashier.
There were too many customers in the store.
I worked quickly and careful but I was annoyed with egotistic and heartless customers.
The customers was thinking they were god.
When I went to a foreign country, the clerks in the country were not so kind.
I think Japanese survise is really good.
But customers in Japan are not satisfied with the great survise.
I often think that is stange and the bad customers should know about that.