Korean movies are all going to fail from now on

You can consider it over since all the patriotic conservatives are starting boycotts.
First, exclude movies directed by Heo Min-ho or produced by HYBE Media Corp.
Moving on to the actors,
First, anything featuring Yoo Hae-jin, Park Hae-il, or Lee Min-ho.
Anything featuring directors or actors who wrote recommendation blurbs (Lee Young-ae, Jang Dong-gun, Kim Go-eun, etc.).
Park Chan-wook is out,
Bong Joon-ho is already a leftist so skip him,
Anything receiving praise from Lee Dong-jin, skip that too,
.....