They are shitty writers, yes. But the most awful thing they did was “complete” Frank Herbert’s original series (he died before writing the last book). They shoved their own original prequel characters as the big bad, and changed other parts that were set up with the cliffhanger of Chapterhouse: Dune. Then they claimed that it was based off of some discovered “Dune 7” notes that they claim to have found among Frank’s things. The book so so clearly has nothing from Frank (maybe one specific thing), and so he basically exploited his father’s name and the goodwill of the fans with a complete lie.

The fact that he writes shitty EU books doesn’t bother me, but it’s the fact that he claims to have completed the story the way his father wanted, when in reality it is used to advertise his prequel series by reviving characters from thousands of years before with no other reason.

It’s a slap in the face.

I think I laid it out pretty extensively there but the other reply to your comment sums it up. I’d also add that not only do they pretend to complete Frank’s books but they retcon the events of his first Dune book or two in order to shoehorn their characters into their in-betweenquels

They're both very shitty writers but Anderson is in a league of his own. The man is probably the worst scifi writer I have ever read -- he knows nothing about science, he makes no effort to do any research, and he delivers book after book of pathetic schlock scifi just for the paycheck. He's the scifi equivalent of those nameless authors who churn out an endless stream of bland romance novels.