I guess most reviews are negative because the movie was advertised as a 'Keanu Reeves thriller' so they expected an action thriller. But John Wick this is not, and I'm really glad it isn't. This is a slow paced, very old school, psychological thriller. The air is thick with danger, the menaces are everywhere, the main character navigates dangerous waters, but there is no 'action' scene per se until the ending. The film follows its path, slowly but surely towards the inevitable.
The script is basic and rather clicheistic, but saved by strong, nuanced performances.
To quote two interviews, this is a grown-up movie about people and relationships. A bit of redemption, too.