About the subtitle

First of all, I have to say that the subtitles are bad and I couldn't understand anything properly. Due to that I'm a bit confused about the story. Otherwise the acting of the cast is good. I personally dislike school bullying but I believe this series will turn out to be good. I've checked various websites that have this drama, to get proper subs but all the sites have the same thing. I would be glad if you could suggest me some websites to watch the series with proper subtitles. Thank You!