There’s real tenderness in a show like “Hacks.” Real cruelty, too, and that’s separate from its insult comedy sensibility. Back for its third and strongest season on Max, the Joan Rivers-esque showbiz veteran Deborah Vance (Jean Smart) and her semi-obnoxious Gen-Z writer Ava Daniels (Hannah Einbinder) have a new goal: To land Deborah the job…
