Exodus 5:22
And Moses returned unto the LORD, and said, Lord, wherefore hast thou so evil entreated this people? why is it that thou hast sent me? And Moses returned unto the LORD, and said, Lord, wherefore hast thou so evil entreated this people? why is it that thou hast sent me?
Pharaoh was still demanding the full quota of bricks without straw and had the officers of Israel beaten. Those officers then charged Moses and Aaron with making Israel hated by Pharaoh and his servants and putting a sword in their hand to kill them. In great distress over the worsened suffering and this blame, Moses returned alone to the Lord with this prayer.
By asking why God had so ill-treated the people and why God had sent him, Moses meant that since he had spoken to Pharaoh in God's name Pharaoh had done greater evil to Israel while God had not delivered them at all. The cry came as Moses felt almost like complaining and murmuring over God's delay in delivering His people. The cry expresses distress and confusion as the promised rescue seemed to have failed and brought only greater harm.
Israel expected deliverance from bondage without any particular trial of faith or suffering on their part. The delay in deliverance was because Israel had but little faith, was not yet prepared to be delivered, and was unwilling to patiently suffer and perseveringly endure affliction until God worked for them a glorious deliverance. God answered that Moses would soon see what He would do to Pharaoh and assured him that the covenant with the fathers would be fulfilled.