Source: https://n.news.naver.com/mnews…le/021/0002497893?sid=103
TL/TR
The drama was targeted for distorting History before it even aired due to snippets of a synopsis that was spread around the internet right after the whole Joseon Exorcist debacle and was just thrown into the same pot. The same people who complained about Joseon Exorcist where the ones who organized the project to ban SD, the reason everything happened so fast. They made a posts right after the first episode, continuing accusing the Drama if distorting History. These one sided claims claims were spread to other SNS sites and the media reported about these one-sided claims without fact checking if the claims are true, there were no efforts made to really investigate if the claims were true and people who didn't watch the Drama started to complain about it and joined a petition to ban the Drama right after the first Episode . This lead to many believing that there was indeed distortion of History that happening. Media companies these days want fast clicks, so instead of a in depth coverage of the situation, just made a quick report about about people complaining about the distorting of history and the blue house petition to get the clicks (cause thats what people were interested in). After the 5th episode cleared some of the misunderstands, their focus has now went to the poor viewer ratings. Controversy remains for the sake of controversy. The media and SNS sites reporting about the incidents without fact checking have caused a lot of damage.
Top comments, made mostly by people 40+... so people who did experience the era...