Haven't watched this yet and I have no comments regarding anything that the show did but one post here caught my attention.
The one that said this show's audience are kids. I will have to disagree. Old ips are beloved no matter what age you are because you grew up watching it as a kid. As an adult, it is still very dear to me. The same way Dragonball is a show for kids and I know a lot of old ass people watch the new one still.
This new 'show' is only under the umbrella of the franchise. It's not being marketed as a product of HB's (Warner's) Scooby Doo. It's more like a "what if" fantasy spin-off fan fiction that was somehow budgeted, produced and sold with rewrites of characters similar to "the Mystery Gang." The trailer even projects this desperation for HBO to 'trust it' and adults to jump in who know very little about the original IP outside some nostalgia they may have of watching it when it was syndicated.
The OG Scooby Doo was marketed toward kids or young teens. Ruby/Spears had even confirmed this in various interviews. When HB studios pitched Scooby Doo in 1969, the audience was targeted toward children as the network felt Johnny Quest was the 'more for adults' cartoon of that time. I'm a pretty avid animation fan and I have all the older 60's/70's and 80's Scooby Doo titles on physical media. Adults can enjoy it but the humor is dry in many episodes...even for kids outside Shaggy, Scooby or guest monsters. 'Velma' was sold for adults and would likely piss kids off. Why?
Where's Scooby? That's what the kids want.
Anyway, don't give yourself grief by trying to attach it to what anyone on the OG series did (especially the late Iwao Takamoto) because Scrappy Doo is more related to the franchise than this turd.