Man can never obliterate his consciousness, the truth that it is he looking out from behind his eyes. In hell there is no suicide.
This is the fate of those who persist in hating God, refusing to see His goodness expressed in creation and above all, in the incarnation of His dearly-beloved Son, delighting to do His Father's will even unto death for His enemies so as to reconcile man and creation with the yearning Father of all creation.
His Father vindicated Him by raising Him from the dead so that He can give life to all who love Him. But He will condemn all who persist in turning their backs on Him. They will live in perpetual torment and darkness, but fully conscious of it.
When God wants to teach a man theology He sometimes gives Satan permission to send him to hell first. It is a desperate place to be.