They’re aiming for fans of D&D, Critical Role, and anime.
That narrows their numbers a LOT. Each group you add lowers it's appeal to general audiences. Normally you want to appeal to a larger and bigger audience rather than go niche.
I know it may appeal to many here that don't fall into the categories I listed, but (and meaning no offense) we here are a very small minority compared to the numbers who are the actual viewing public.
With what they've done I see it turning off a LOT of households (cartoon with violence and language...which is kind of like South Park, but this isn't a straight comedy and fantasy is another arena that makes it a smaller appeal already). It's not like Futurama which addresess some adult ideas but is clean overall, this series appears that it is going to be far over the top with language and violence from what I've seen already.
The only thing I can see keeping this from stopping anymore series like this being made and this being the last set of cartoons like this is Jeff Bezos. I think he is a MAJOR fan of D&D stuff and Fantasy...soooo...I could see him continuing it even if it has terrible numbers. That's happened before so not unprecedented...
But I just don't see this drawing in massive numbers or having the appeal that some of their other shows have.
I could be wrong (and I know everyone here probably hopes or thinks that I am), but I just don't see this show having a massive appeal overall. I think it may appeal to a subset of college age and a little older viewing audiences, but I don't see it catching on otherwise. I see it as a massive gamble (college age kids can make a cult series and things like that which persist, but just as often they drop them).