The most boring drama ever saw

I watch 50+ drama in this years and My Mister was TOTALLY the worst. Maybe The School Nurse Files was worst, but no problem. I was convinced by the high votes given to this drama. The overall rate is totally FAKE. I love IU but i cannot understand why her fans give to this boring drama the highest vote.
The cast is very good. IU is outstandind. But the story is so low, the brother history is so boring. I thoght to drop it but I kept tough.
I suggest to not to see this drama. Really. The myDramaList rates can be study only on drama with no IDOL in their cast.