Paul Elliott’s review published on Letterboxd:
Heavy-handed writing and unimaginative direction by Gina Prince-Bythewood culminates in The Old Guard being a substandardly lifeless action movie. It concerns an undercover squad of immortal mercenaries who undertake a retaliatory mission to keep their existence classified; the actualisation of them having Wolverine type regenerative capabilities represents the fact that every one of its action set pieces are utterly purposeless as there's practically no physical endangerment, and that gives rise to the whole film being of no consequence.
It's nothing other than nonsensical mayhem with hackney twists and unpleasant pop music used to hold the hand of the viewer to tell them what to experience and when to experience it. The Screenplay by Greg Rucka, based on his Image published comic book series, is weighted with turning points and developments which the writer doesn’t give a justification for and the played-out genre clichés, corny dialogue and characters with names such as Andromache of Scythia, emphasises that everyone involved in its production was primarily interested in picking up the paycheck, and presumably hoping that this could potentially give rise to the inception of a franchise so their salaries can perpetuate.