Why do people complain?

Numbers 11:4-6Then the foreign rabble who were traveling with the Israelites began to crave the good things of Egypt. And the people of Israel also began to complain. “Oh, for some meat!” they exclaimed. “We remember the fish we used to eat for free in Egypt. And we had all the cucumbers, melons, leeks, onions, and garlic we wanted. But now our appetites are gone. All we ever see is this manna!”

Proverbs 19:3People ruin their lives by their own foolishness and then are angry at the Lord.

People complain when things don’t go their way and they don’t get what they want.