Trials from the world of the insane

After a year of evaluation, our main character, Daze, decided he wouldn't live in this world anymore. But how could fate be so kind and let him have his way. Everything went wrong the day he decided resign from life. A lunatic started a killing spree in the place at where he worked in and nearly killed Daze. Through sheer dumb luck, he survives by the skin of his teeth. Then he was brought to a place for a ??? reason to become an experiment. And so he was brought to the place where all mad people go to and survive terrifying ordeals to learn the secrets of the mind.