Is Mark Hamill Disappointed In Last Jedi?

Mark Hamill has been involved with the Star Wars saga since its origins, yet The Last Jedi is the first film since Return of the Jedi in which he gets a substantial role. Throughout the promotional tour for the film, the actor has made many jokes and references about how disappointed and surprised he was with the story, leading many to wonder if Hamill genuinely hates the new installment and where it took his character.