Blamed for Israel's Hard Labor

Exodus 5:20-23
 
20  And they met Moses and Aaron, who stood in the way, as they came forth from Pharaoh: 
21  And they said unto them, The LORD look upon you, and judge; because ye have made our savour to be abhorred in the eyes of Pharaoh, and in the eyes of his servants, to put a sword in their hand to slay us. 
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? 
23  For since I came to Pharaoh to speak in thy name, he hath done evil to this people; neither hast thou delivered thy people at all.