★★☆☆☆Idris Elba on autopilot, an underused supporting cast and some terrible chunks of sub-Tarantino dialogue are among the many lowlights of this mishmash western from the singer-songwriter Jeymes Samuel, aka the Bullitts (his short film They Die by Dawn, also a western, is vastly superior).

Elba stars as real-life 19th-century American outlaw Rufus Buck, who, in this deliberately anarchic version of pop history, is the mortal enemy of cowboy hero Nat Love (Jonathan Majors from Lovecraft Country).

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Buck, we learn, during an initial and outré scene-setting flashback, massacred Love’s family and cut a cross into the young boy’s forehead.

The movie that follows is, thus, an avenger’s drama in the grand western tradition (“You killed my pa!”), but one that’s structurally patchy,