It got better as you watched it, but still feels like it was missing the full noir experience. I believe this is due to a lack of emotion from the MC. This is probably the script’s fault though - MC needs to have more visceral responses and dialogue to make the noir feel realistic.
It was trending so well in the first couple of episodes. Then it used some OLD kdrama tropes and reverted back to about average. Not bad, but there was a lot of potential.