Anyone who thinks that this earth is the finality of life cannot live a life which pleases God. Many Christians are upset with God, and a few even lose their faith because In this world a lot of things seem to be upside down. The psalmist was upset by the fact that the wicked seems to live a prosperous life while the righteous suffers until he understood that he has someone in haven. This life is a preparation for eternity. 

²³ Yet I am always with you;
    you hold me by my right hand.
²⁴ You guide me with your counsel,
    and afterward you will take me into glory.
²⁵ Whom have I in heaven but you?
    And earth has nothing I desire besides you.(Psalms 73)

Please read Psalms 72 - 74. And Listen.

May the Lord richly bless you!