Colours of Redemption

He had been happy with dying. Happy with no longer putting up with this pathetic excuse of a life. Severus Snape was just so damn happy to finally leave this world behind. Wasn't he done? Severus had given it all, his sweat, blood and tears. What else could they want? He had already given them his soul and body. Severus had nothing left. Why was he forcefully trapped in a timeloop?