This argument disregards how beloved Scooby Doo is as a franchisePlenty of bad series come out all the time. Some of them remakes of other properties. The only reason this is getting special attention is because a non-white person is the driving force behind it and some races were modified on the show.
Is that especially egregious? We all know if all these characters were white and the show was still bad it would have had a moment and people would have already moved on. Literally the only reason people care so deeply is because these characters races were changed. Is their races being changed what makes this show so bad? No.