Billionaire founder Larry Ellison and his daughter Megan Ellison.Kevork Djansezian/Getty ImagesAnnapurna Interactive's entire 25-member staff resigned this week amid internal tensions.Megan Ellison, the daughter of billionaire Larry Ellison, owns the company.The resignations came after failed talks to separate the studio into its own company.Megan Ellison's award-winning video game company has a problem: Nobody wants to work there.Ellison is the daughter of Larry Ellison, the billionaire cofounder of the world's third-largest software company, Oracle.