I mean that was Paul’s whole point wasn’t it?

The Bene Gesserit thought that a Kwizatch Haderach would be able to redirect humanity to a “more human” golden age. Paul saw it, saw the future, saw the violence it would lead to. He didn’t want to do that, but he realized that intergalactic reliance on a drug, concentrated ultrawealth, concentrated Supreme power needed to be detroyed by itself, and only then could individual humam freedom return. So he tried it without becoming an inhuman entity, and failed. Leto II saw the golden path and Paul’s failure, and said “ok fuck it. I have to become a monster, a mass murderer. Inhuman. But I will break what we have to restore individual freedom to humanity.”

It worked, but took what, 7500 years?

Of course, its all a science fiction story pointing out the inability of Supreme authority from being able to fix the problems of society, and how dependance on a single resource leads to the destruction of humanity.