I agree. Frankenstein is a great novel, and I've taught it at the college level, but I wouldn't include it in a high school curriculum. It feels to me like those "great books" lists got frozen in 1880-something, when general literacy (among literate people!) was much higher than it is today. Imposing texts like that onto much less experienced readers (much as we might deplore their relative lack of sophistication) seems almost punitive, and turns them away from reading entirely.

(I'm not familiar with We Do Not Part; thanks for the recommendation. I love all of the other authors you mention, and will check Han Kang out.)