Katherine Schwarzenegger wasn’t impressed by this year’s Met Gala looks. The best-selling author threw a quick dig at the 2024 event, hosted at the Metropolitan Museum of Art on Monday, May 6, while praising her mom, Maria Shriver, for the show-stopping ensemble she stepped out to the event in more than 20 years ago. “When the Met Gala was chic and classy,” the 34-year-old daughter of Maria, 68, and her ex-husband, Arnold Schwarzenegger, 76, wrote via her Instagram Story, as she re-shared a post the book author uploaded to the social media app featuring photos of herself from the 2001 Met Gala…