Life's Great Comeback: I Got a Billiards God System

I couldn't find any novels about billiards, so I decided to write one myself: a feel-good billiards story with a System.

A low-ranking county official with no connections, no hope of promotion, and a meager income is looked down on by his mother-in-law and abandoned by his college girlfriend. Then he unexpectedly gains the Billiards Prodigy System, makes a name for himself in his small county, becomes unbeatable across the provincial capital, and enters the national championships. From there, he rises to the pinnacle of life.