Wasn't It Always a Rather Sketchy Proposition...
Launching a megabudget, high-profile show based on a series of books that hadn't even concluded yet? Why did anyone assume that would even work?
D&D were never more than reasonably competent TV hacks. They never showed signs of being any sort of creative geniuses. Why did anyone think they could produce material on a par with a brilliant novelist who's been working for decades?
In retrospect it kind of seems it was always doomed to fail.