LOS ANGELES—An emotional Britney Spears on Wednesday called the 13-year-long conservatorship that has controlled her life stupid and abusive, saying she felt traumatized and angry and wanted her life back. In a statement of more than 20 minutes, pop star Spears, 39, told the Los Angeles judge overseeing the arrangement that she wanted it to end. “I just want my life back,” she said. “I’m not here to be anyone’s slave.” “I’m traumatized … I’m not happy, I can’t sleep,” she said. Spears said her frequent upbeat postings on her Instagram account were lies. “I’m so angry. And I’m depressed. I cry every day,” she added. Spears delivered her remarks by phone, her first public statements about the court-approved arrangement that was first put in place in 2008 when she suffered a mental health breakdown. “I truly believe this conservatorship is abusive,” Spears said, her words tumbling out so fast …