LaVar Ball says the Charlotte Hornets are screwing up the LiAngelo Ball situation … telling TMZ Sports he’s convinced the team is making a massive mistake by not pairing Gelo with his brother, LaMelo Ball, on its NBA roster. “They don’t understand what they got,” the Big Baller said of the Hornets out in L.A. this week. “They need to let my boy go ahead and play. I dropped them a superstar in the G-League and they don’t know what to do with him.”