Entertaining to a certain point but almost nothing new. With so many espionage thrillers made in the last three decades, this one never does anything new with the genre, and it lacks particularly strong characters.
I've never been a huge fan of films that are more of a sensory experience than a narrative one, and this is a perfect example. There are here some good ideas, some good scenes, a good performance by Phoenix, but ultimately style over substance is also here from start to finish, and the style isn't even that great. So if you like meandering plots and boring seen it before violence, You Were Never Really Here is the movie for you.