...7 and 14 this may be the perfect show for you, for anyone else you'll notice the sophomoric writing is sub-par, the acting not much better, and the overall story lacking. It plays out like a 70s TV cop show while looking modern.
The main character is a clueless guy that has no standout features - he's not a good fighter, he's not particularly a good detective, and he doesn't seem all that intelligent, but no one seems that intelligent in this series.
The bad guys are your typical Asian posers that only come off as 'bad' because they have bigger and better guns and way less morals than anyone else. They aren't that smart either though.
I'll watch a couple more episodes unless it gets worse, but I've seen some quality Korean movies and drama and this isn't in the same league - not even close. Watch the first episode and you'll see all sorts of plot holes and silly tropes, but if you can get past that it unfortunately doesn't get better...so far.