what is the purpose of the play "Endgame" by Samuel Beckett?

The existence of God is questioned and indirectly denied, painting a bleak picture of life as hard and without redemption, directed by the needs of handicapped tyrants like Hamm. When Hamm orders both Clov and Nagg to pray to God, Hamm cries in agony, "The bastard! He doesn't exist!" Hamm and the other characters, in their stagnant misery and frustrations, lack faith in a benevolent promise of God to reprieve or redeem their anguish. Life seems a merciless cycle of desire and grief, of handicaps and ashbins, and, to these characters, death is no reward for enduring that cycle. The characters of Endgame maneuver through lives of emotional strife that anticipate death, though they lack the means to achieve it on their own.