Yeah. So many of the recent Marvel movies are falling into that same trap. MADAME WEB = two-hour trailer for a sequel we may never receive (and that's fine) where the main character is actually called "Madame Web" and she actually leads an actual team of actually-costumed actual superheroes. I haven't seen WEREWOLF BY NIGHT yet but I imagine you and most other folks were hoping to watch a movie about a werewolf, not a movie about a guy named "Jack Russell".
If they had called the movie
Bloodstone, I don't think there would have been any complaints. In fact, I'd guess that people would actually praise the inclusion of Werewolf by Night in that case.