There's no need for us to denounce Michael Bay's Transformers: Age of Extinction as the downfall of modern cinema, because one of his characters essentially does it for us. Early on, as Cade Yeager (Mark Wahlberg) rummages through a run-down old theater, the theater owner makes a comment about how sequels are the reason why it failed. Bay knows that the films of this franchise are constantly crapped on, but he clearly doesn't care. This is the most excessive movie he's ever made, and it's also one of his worst.
Transformers: Age of Extinction
Director: Michael Bay
Starring: Mark Wahlberg, Nicola Peltz, Jack Reynor, Stanley Tucci