I found so many flaws in this, that i dont know where to start... First, it looks very outdated in terms of filming technique and dynamics - or lack of it, it's very slow for a revenge/ action drama. Also, the colours are dark and washed out, be it for the present or past actions. Too much time is assigned for the memories of the ML, like - we got it, let us get to the point already! Very tropey, a lot of of symbolism, but everything thrown into our face, no mystery left to keep us waiting! And, above all, veeeeerry slow pace - 20 long episodes packed with unnecessary dialogues, staring and whatnot BUT action.
Dropped and dont consider giving it a try any time soon.