sued by his ex, singer FKA Twigs, for sexual battery.As a LaBeouf pal told The Post: He’s an “extremely troubled” individual.“This has been hugely traumatizing for Twigs,” said a friend of the singer, alleging that Twigs is haunted by memories: “Shia having a gun by the side of the bed and her fearing to go to the bathroom at night — it’s a primal fear to be stuck feeling helpless in the dark.”Twigs (neé Tahliah Debrett Barnett), 32, filed the lawsuit which contains allegations from another of