This is the most confusing film ending, according to the public

nme.com:

Warning: Spoilers ahead A new study has revealed the films which have left British viewers the most confused by their endings, with one director’s output dominating the list.Conducted by the group BonusFinder, the list has been compiled by aggregating the total number of UK-based Google searches related to explaining the endings of films, with Martin Scorsese’s 2010 psychological thriller Shutter Island coming out on top.In the film, Leonardo DiCaprio plays the US Marshall Teddy Daniels, who travels to a hospital for the criminally insane to investigate the disappearance of a patient.

However, as the film progresses, it is revealed that Daniels is in fact a hallucinatory persona and that “Teddy” is in fact Andrew Laeddis, another US Marshall who had been imprisoned at the facility for murdering his wife after she had killed their three children.The film ends on a philosophical note, as DiCaprio’s character appears to simulate another psychological relapse in order to bring about a lobotomy procedure, as living with the knowledge of his reality has become too much to bear.Not taking the top spot, but with four different entries in the top ten are the films of Christopher Nolan.