There have experiences in my life where I have asked God "Why?" Initially I would feel guilty or condemned for expressing such a lack of faith. But, in Matthew 27:46, Jesus asks his Father and His God, "Why have you forsaken me?" In my valleys, I have asked that same question. I truly believe that God, in all his perfection, intentionally created us with emotions for the purpose of expressing them. Engaging our emotions glorifies the inventor of them. I don't believe that God frowns upon our exercising of anger, doubt, frustration, or hurt. I think the opposite; I think He longs for us to communicate our hearts to him, and in our bare honesty, He can move. We are closest to him, when we are being transparent, even if that communicates how far we feel from Him.
Psalm 34:18 "The Lord is close to those who are broken-hearted, and to those crushed in spirit."
Psalm 91:1-2 "He that dwells in the shelter of the Most High will rest in the shadow of the Almighty. I will say of the Lord, "He is my strength. My God in whom I will trust."
Psalm 16:5 "For He has assigned my portion and cup, and has made my lot secure."
1 Corinthians 12:9 "My grace is sufficient for you. My power is made perfect in your weakness."