When God's Not Good Enough
Ingratitude to God is a rejection of His love and His gifts. Scripture gives examples of human ingratitude to God for all the blessings and gifts which he provides for them. It is especially important for Christians to give thanks to God.
but discontent magnifies what is past, and vilifies what is present, without regard to truth or reason
Ingratitude of people to God
Israel’s Repeated ingratitude to the Lord
For deliverance from Egypt:
They so undervalue their deliverance, that they wish, they had died in Egypt, nay, and died by the hand of the Lord too. That is, by some of the plagues which cut off the Egyptians; as if it were not the hand of the Lord, but of Moses only, that brought them into this wilderness.
They count upon being killed in the wilderness—nothing less, at the first appearance of disaster. If the Lord had been pleased to kill them, he could easily have done that in the Red Sea; but then he preserved them, and now could as easily provide for them. It argues great distrust of God, and of his power and goodness, in every distress and appearance of danger to despair of life, and to talk of nothing but being speedily killed