You begin to think that it was not worth it. All of these feelings, and many more, may be the result of unrealistic expectations. Others may feel excitement and satisfaction when exactly the same events occur if their expectations were more appropriate. Everyone has expectations. And even if you do not have them for yourself, others have them for you.
Expectations come from many different sources.
People with successful ministries are chosen to go, and such people believe they will have good ministries as missionaries. They would not go if they expected to be failures. Your home church is supporting you with prayer and much money. They expect to see some return on their investment. They eagerly anticipated your coming to make their load more bearable.