Here are three great children's books about cranky couples:
Isadora, Rachel, Jacob Grimm, and Wilhelm Grimm. The Fisherman and His Wife. New York, NY: G. P. Putnam's Sons, 2008.The fisherman's greedy wife is never satisfied with the wishes granted her by an enchanted fish.
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Marshall, James, and James Marshall. George and Martha Back in Town. Boston: Houghton Mifflin, 1984.
Though their friendship is often tested, George and Martha survive with a sense of humor.
Dahl, Roald, and Quentin Blake. The Twits. New York: Knopf, 1980. The misadventures of two terrible old people who enjoy playing nasty tricks and are finally outwitted by a family of monkeys.