We are not called to complain; we are called to glorify our God. “Even every one that is called by my name: for I have created him for my glory, I have formed him; yea, I have made him.” Isaiah 43:7

So why do we complain? Job gives us an answer, “Therefore I will not refrain my mouth; I will speak in the anguish of my spirit; I will complain in the bitterness of my soul.” Job 7:11

The anguish of our spirit and bitterness of our soul causes us to complain. Deep hurt, grief can cause us to have anguish and bitterness. God already knows what you are going through; He does not want you to linger in it, don’t let the enemy take you to the pit.

“I cry out to the Lord with my voice; With my voice to the Lord I make my supplication. I pour out my complaint before Him; I declare before Him my trouble. When my spirit was overwhelmed within me, Then You knew my path. In the way in which I walk They have secretly set a snare for me.” Psalm 142:1-3