Great storyline but I feel so helpless.....

I have just finished watching 2 episodes, and I can’t bear to write a few words about this.
The story line is 10/10 but their acting makes me feel so helpless.
Sorry to say but the 2 main male roles acting skills are not what I expecting for.
It feels like they only express 70% roles sentiment.
Just imagine that they showed you wonderland but when you were almost there, even you could see how beautiful the place was, but then they STOP and keep playing near by.
Just.... helpless -_______-