Hope dies during “Transformers: The Last Knight.” From the very beginning, this is an incoherent mess. Cade’s daughter and her boyfriend—both memorable characters from the last film—are gone, the daughter written off with a couple of horrendously manipulative beats about her being at college and Yeager being on the run. He can save the world but he can’t see his daughter. Whatever, fine, but also gone are Stanley Tucci (other than a brief cameo as Merlin in the opening scenes) and Kelsey Grammer. The villains of the first film are replaced here by a purely CGI enemy named Quintessa (Gemma Chan), an interstellar being who wants to use the home planet of the Transformers to destroy Earth by basically crashing them into one another. She’s such a cartoonish, poorly designed villain that she never feels like a real threat.