Show, you had all the ingredients to be absolutely amazing, but you chose to sell yourself short, why?
The story is this:
“Kim Tae Hyeon is a talented surgeon. Desperate for money to pay his sister's medical bills, he adopts the code name Yong Pal and offers his medical skills to those in need of medical attention but who cannot do so publicly, dealing with gangsters and corrupt plutocrats”

Why add the whole “Yeo Jin” and the chaebol’s stories, politics…? Why oh Why not stick to the initial and simple plot above?

Yong pal is a total Badass but Tae Hyeon (the character) disappointed me to no end. I believe they had the perfect actor for the role, but decided to turn a tiger into a house cat.
I am disappointed with you show, because we could have been best buds and now, you’re just the brother in law I only want to see during Christmas holidays (and I’m being nice).