My eyes first fell on "James Dean-like" and so my assumption on starting to read the quote was this was going to be a complaint about GDT totally misunderstanding James Dean.

I expect some nudity

You should probably try reading the book sometime.

Read it three times, thanks. My annoyance is with how sentimental (and unscary) Del Toro’s forays into horror are, and it feels like this source material is triggering all his worst impulses.

It is pretty much what Mary Shelley would have expected as well.

Mary Shelley isn’t sentimental the way GDT is tho.

Every unsentimental artist is alike. Every sentimental artist is sentimental in their own way.