Frankenstein is the monster
Spoilers: I have no idea where the minds of hundreds of "intellectuals" got the idea that the incel who murdered a child because he was lonely, was a better person than the young man cleary distraught over every one of his family member's death, and whose only crime is graverobbing, in the name of science. He clearly sympathizes with Frankenstein, whom left his apartment, the only place he may find love, of his own will, and only destroys the Bride when he starts to think clearly for once.
The book itself though, and it starts off with Walton narrating to his sister about something we don't care about, and barely matters to the plot. I skipped past this section the first time I read this, and missed nothing. Why start the book this way? Everything Walton says is summarized at the end, except there, it's actually interesting. The next two chapters aren't that better, but at least they serve a purpose.
While I hate people who say that Frankenstein isn't the monster, he is clearly portrayed as a tragic figure here, as is his creator. In my opinion, the drama is done very well, and well sometimes cheesy, is mostly realistic. Particularly when Frankenstein stalks the DeLacey family.
Granted, every character other than Frankenstein and his creator lack the depth they do, but unlike "Dracula", "Frankenstein" never expects you to care about them. It instead expects you to care about how it affects the protagonist, which it manages well.
Overall, the book is worth your time, but is definitely more focused on emotional drama than horror.