With all due respect, I think There are two types of people who gave the movie a 1 star review ..

Rating: 9/10 (27 November 2019)

So these people are : one, the Sharon Tate fans who expected a biography which in so many occasions Quentin Tarantino and the whole cast said it isn't. and the other type are those who are the fans of Charles Manson Family and got disappointed by the ending.
I'd like to explain really quick,, the movie is the story of the rise and fall of a Hollywood actor Rick Dalton and his stunt double Cliff Booth ,, and how if they both kinda really existed, then the tragedy of August 9th 1969 night would look different , more action,, a bit happier .. think about this perspective and go watch it again ..
I mean If you are a "Tarantino" fan you'd know that this is his style and the movie was really good ,, maybe not Pulp Fiction good ,, but still the idea of it is really good.
I don't think there's a need to talk about the cinematography and the directing and screenplay any more .. Brad Pitt acting was subtle and cool, DiCaprio's role was the emotional and delicate,, Margot Robbie took the innocent and hopeful part ... Tarantino literally made the movie a whole and casted the story parts perfectly ... I mean the movie will be nominated for the Oscars next month .. and no, not just because of the names in it .. so good luck.