I have not actually watched this film (because it’s probably not good). And yes I’m aware that Dracula is actually an anti-semitic caricature of the feudal aristocracy. Doctor Frankenstein is the actual bourgeois, while the monster is his proletarian creation. Neither can actually exist without the other. The monster is the real hero of the story and the proletariat is the hero of history.
Doctor Frankenstein is a slave master that enslaves his own children; Frankenstein Jr regains his humanity through the struggle against his own exploitation and oppression, and in that process rehumanizes Dr Frankenstein by dethroning him from godhood and bringing him back down to Earth.