He's Jabba before Jabba.
Anyway, my beef with the Dune sequels is the same as my beef with the Ender sequels: The author spent a whole lot of time, thought, and effort, building a world with rules and boundaries. And then, when the rules and boundaries interfere with what they want to write in the next book, they tear them out, wipe their asses with them, and flush them down the toilet.
I'm afraid I have no references to back any of this up because I have blotted all the sequels out of my brain as best I could, much like I did the "Star Wars" prequels that aren't called "Solo" and "Rogue One."
And the "Star Wars" sequels that aren't called "The Return of the Return of the Jedi: The Force Awakes," which wasn't great by any measure, but it wasn't terrible. Could've used some dancing teddy bears in the finale, but it didn't totally suck.