The sad ending was that he failed in his quest and lost all hope. He had put in so much effort and dedication, but it seemed like nothing was enough to make his dreams come true. He felt defeated and hopeless, unable to see any way out of the situation he was in. He eventually gave up on himself, believing that there was no point in continuing on with life anymore. This unfortunate ending showed just how devastating failure can be when you don't have anyone to turn to for help or guidance.