Contradiction with Exodus 2:24
It states that God remembers His covenant and hears the groaning of Israelites, however, Exodus 2:23 suggests their cries weren't acknowledged for a long time.
Exodus 2:24: And God heard their groaning, and God remembered his covenant with Abraham, with Isaac, and with Jacob.
Contradiction with Exodus 5:21
The Israelites blame Moses and Aaron for worsening their situation, which contradicts the idea that God was responding to their cries in Exodus 2:23.
Exodus 5:21: 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. [to be...: Heb. to stink]