Each of God's aspects of love has been distorted through Satan's intervention. Men are not whole, confident loving beings, freely growing through the receptive, mutual, and then giving stages of love with God and with each other. If the fall had not occurred, man would have been responding deeply to God, and expressing love to his fellow man. In turning towards Satan, man lost his capacity to respond to love, either to receive true love or to give it. Thus man, in never learning how to put forth true love, has never felt true joy either from other men or from the creation.
Unreturned love brings neither joy nor power to the giver nor can it last long.
This is exactly the same for God. He has never felt love fully returned from man because He has had no perfect vessel to whom He could express His love wholly and His power freely. One feels only frustration and sorrow when unable to express love fully or freely. Throughout history, God has never received true glory and joy from man. But God's belief in man's capacity to return to Him is steadfast.