A hero's rise to demise

Vincent is your typical round about hero. He is an orphan raised by a church in the land in Lesidnia. He is adopted by the head priest and eventually becomes the holy sword wielder. He trains hard and is eventually able to conquer the demon lord of Crimora. But not all is as it seems. After he conquers the demon lord and kills him the kingdom sees him as not useful anymore. They now see him as a nuisance and find a way to get rid of him. he is stripped of everything and left with nothing. Will Vincent wallow in despire of will he eventually rise up and take revenge? Will Vincent live long enough to see himself, the hero become the villain?