Charles Asselin’s review published on Letterboxd:
Nolan's most complicated film yet. Oh, not because of the plot or the concept, but because every information is given through dialogue, and I can't hear shit when characters mumble their lines while random action music plays all the time. At least the projectionist had the decency to not boost the bass, so my ears were still functional after the film (unlike others).
Also, it's fine to shoot a dialogue in shot reverse shot, but to shoot all your dialogues but one in shot reverse shot in a film where characters talk 90 percent of the time is kind of bullshit to be honest.
Oh, and it's cool to have John David Washington and Robert Pattinson in your film, but it would also be cooler if they had more personality than the wall behind them. And honestly, naming your main character tHe PrOtAgOnIsT is extremely cringe. Like, It's fine to have a nameless protagonist, but have the decency to not mention it. Anyone remembers the time where Edward Norton shouted ''I AM THE NARRATOR'' at the end of Fight Club? No, because it would've been really dumb. It may seem nit picky, but two different people asked him his name and twice he dodged the question like a weaselly weasel. Nolan is taunting me at that point.
To be fair, the special effects are well done, and some action scenes were cool, even though the best ones were those without the reverse thing (namely the short fight in the kitchen). The climax is also pretty underwhelming, with some cool visuals but nothing really remarkable.
At the end of the day, I don't really hate Tenet, but most of its flaws are simply inexcusable. It feels like Nolan wanted to show off his technical skills with a cheesy spy story and a below-average camera work. Sure, the concept is interesting on paper, but a good idea cannot save a half-assed execution.