The first ever mistake in it was cho byeong kyu's late entry which gives the audience a feel that they were shooting first season and some actors Yeom Hye Ran, Kim Se Jeong, and Yoo Joon Sang acted their worst and not best like there was some kind of competition going in for them to see who's gonna performe worst.

And the most infuriating thing that made me drop it was Korean actors trying to speak in Chinese with their worst accent ever like they didn't even try to improve.

They should have either hired Chinese actors or the Korean actors should have spoken in Korean without trying to force Chinese language and accent. Even their acting was bad accent aside.