[Exo 5:22-23 ESV] 22 Then Moses turned to the LORD and said, "O Lord, why have you done evil to this people? Why did you ever send me? 23 For since I came to Pharaoh to speak in your name, he has done evil to this people, and you have not delivered your people at all."
[Exo 6:1 ESV] 1 But the LORD said to Moses, "Now you shall see what I will do to Pharaoh; for with a strong hand he will send them out, and with a strong hand he will drive them out of his land."
A little context will be helpful here. Moses was called from a burning bush to go rescue his Hebrew people from the oppression of slavery in Egypt. When Moses, along with his brother Aaron, went to the Pharaoh with their demands from the LORD, the situation initially got a lot worse for the Hebrew people and they were angry with this seemingly ineffective leader.
Moses' response was to cry out earnestly and honestly before the LORD. Notice God's response. We don't see any anger from the Almighty for Moses' posture. In fact, He says that "now" he will see what He will do. God was actually waiting for Moses to get serious with Him before He would act.
Often our faith will be tested to its limits for the purpose of us crying out to the LORD in desperation and passion. Be real with God; He wants to be real with you.
*Life Point* God can handle our honesty before Him.