Most people don't choose reincarnation. Reincarnation finds their way to them. Perhaps they did something great in their life. Or maybe truck-sama wasn't looking where it was going. But without fail, those who reincarnate are destined for something great. A new life where everything changes for the better. But... Reincarnation isn't always the greatest thing. Sometimes you just draw the short end of the stick. Di Tou just happens to have drawn the shortest stick. Pulled out of his life randomly. Taken by a crazy old eccentric man not as a disciple, but as a body double?! And a janitor body double no less?! Grasping a system to find... It's a JANITOR SYSTEM!? Truly, how unlucky can one get?
What Fu Hao Xin really found disheartening was that he wanted to cultivate in order to gain 'freedom' the freedom to live his life, the freedom not to worry about beasts threatening his life, and those around him. The freedom to act in a broad minded manner, with the ability to forgive, forget, and to be kind.
But having faced this cruel reality, he found that although he had become strong, he hadn't gained that freedom. Instead, he had been tricked, believed in friends who were plotting behind his back, and he had been hurt because of his strength. This was a reversal of roles!
As a youth he had suffered the cruel test of nature because he wasn't strong enough, and now that he was strong enough, he suffered the cruel test of humanity. No matter what, it seems like he was bound to lose something! And after working so hard, not only had he not accomplished his goals, all he had to show for it was a broken body.