Neri Fossatti’s review published on Letterboxd:
Technically it is very good, the action scenes are impeccable and there are good practical effects, but in a world in which youtubers do beautiful videos because the cameras already do everything by themselves, this is less of an accmplishment than it used to be. Besides, with John Wick, Atomic Blonde, M:I, or the new 007's, cool action pieces are no longer enough. You need characters that convey something, a plot that catches you, and Tenet is just boring.
The bad guy is Hans Gruber, he's old. The plot is neither so complicated that it keeps you thinking, nor so simple that it allows you to disconnect your brain and enjoy the scenery.
We don't know enough about the characters played by Washington and Pattison to care. Debicki's character motivation is so 2010's empowerment. "My husband hits me, I want to go, I want to face him, I want to do it for my son."
Nolan made his worst movie after making one of his best.
It's a shame. I really wanted to like this one. I'm not being a snob, but this man needs to put heart and plot in his movies again. Cool visuals are not enough anymore.