Miller’s well-documented antics in the months following filming — it was the first time the actor had been seen in public in almost a year.Sporting a white suit jacket with black detailing and long wavy hair with a topknot and braids, Miller told “Flash” director Andy Muschietti on the red carpet: “I love you, maestro. I think you are amazing, and I think your work is monumental.”It was the actor’s first public comments since a raft of stories last year about erratic behavior in Hawaii and Iceland as well as their home in Vermont.Miller, who uses them/they pronouns, has been holed up at their Vermont farm for the past year while undergoing outpatient mental health treatment, their publicist told The Post.“The Flash” has gotten good-to-mixed reviews, with The Post’s Johnny Oleksinski calling it “good fun” and raving that Miller “is DC’s much-needed answer to Tom Holland’s embraceable Spider-Man.”Meanwhile, Twitter was awash with criticism of the actor this week, calling Miller an “abuser” and a “groomer,” but their rep said Miller is getting real help and is recovering.“This is not a publicity thing,” the rep said.