Why did every Frank Herburt Dune book after the first suck?

[Almo]

I rather liked White Plague...

Agreed. Though he left out one thing:

Cloning. But I can accept the book as an exploration of what would happen if cloning did not exist.

Sheesh, it was Jessica's gutsy call that created Paul in the first place. She should get a little more than "wifey" status for that.

But creating Paul was not necessarily a good thing. The books were quite ambiguous about this.