So this drama has:
The most overreacting stereotypical boring psychopath. The other characters acting is alright, but they tried too hard to make this guy edgy.
Bad communication, ridiculous investigation, dumb decisions, cliches...
Unlikeable characters all around
Very annoying twin brothers
Worst girlfriend material
Very predictable "plot twist"
Everything is predictable from a mile away

And of course in the end our crime writer guy who got so brainfucked by the events of this show be writing "die" endlessly over and over again. Totally buying that of course.....