I enjoyed the film, but it also annoyed me. That's not necessarily bad.
Just to clear some things up, the main character is not a young man. He does not look like a young man. He did not act like a young man. He acted like a wise predator.
He's not giving anything away in his demeanor, which helps in his line of business, but it also acts as a bit of a prison. He treats his women badly, and they seem like little more than toys for him to play with. He wants to be a mystery. He has lost the ability to connect.
It was as if he just wanted to maintain his emotionless facade all the time. When he does show emotion it doesn't necessarily make you empathize with him. This results in a kind of nihilism which can also make it difficult to connect with the film.
With really great actors, they can find ways to show a bit of vulnerability which you can latch on to. I don't think that's what the director/actor was interested in. In that respect I think he was successful, but maybe the nihilism isn't my thing.