Sometimes, we ask God for too little. Probably all the time.
God is not the God of "just enough" or the "what you expected". He is the God of "more than we could ask or imagine". Yet, when we pray and try to hold on to that idea, our limited way of thinking and seeing so often overrides our faith. We can't quite believe that God would be impossibly good because we don't see how what's happening can be good. We don't think waiting is good, or that what's unfolding without God's intervention can be good. So we start to doubt.
If ever a people could have doubted God's goodness, it would have been the Israelites in slavery. And yet Exodus is a story to show us that God brings salvation from places and through situations that we'd never expect. Moses' mom hoped for her son to survive. God had much bigger plans.