I Will Be... a God!
A loser in life finds out his whole existence is caused by a glitch in the matrix and is rewarded(?) by those who watch over the Earth. It will be a slow start and starts with attempted suicide (not really a spoiler since it is the first paragraph). The hero isn't a hero, but more an antihero, and he plans on doing terrible deeds in the name of his upstart religion.
Tags: Rags To Riches, Alternate History, Far Past, Time Travel, Were animal, MaleDom, Harem, Transformation, Violent