It took me 20mins to realize Seyrig also played Jeanne Dielmann because I was busy watching her seduce literally everyone in this movie.
Russell gets to play against type and crushes it. In the hands of a lesser performer, Jeff would be a nebbish, even unlikable protagonist. But Russell imbues his performance with a sense of desperation that defines the whole film.
This and Red Rock West would make for an amazing JT Walsh double bill.