Out of ideas, they decide to do the one-take style that the Revenant, Roma, and Birdman did, but oh, for some sort of originality, let's just do it for war, and at that let's pick WWI so people don't confuse it with Nam or Private Ryan.

Sure, camerawork looks good, kudos, but the shoehorning, lack of a script, mediocre acting, deux ex machina, no character development, and suspension of disbelief turn this into a sort of dumbed down cartoon of a war picture. The only emotional scene was in the final 30 seconds, Everything else, basically was implausible. The fact that some people are raving about and loving this movie shows that either a) the studio, Mendes and those involved have hired a bot army or shills to hype it up, or b) moviegoers are that desperate and dumbed down, but it's probably a combination of both, leaning more towards a) as the predominant reason.

Plot armor like Commando, a ridiculous scene about milk, and soldiers administering dangerous enemies with nursing like they were their family member makes the whole script unrealistic and implausible.