LOTR: Why Does Saruman Reject Gandalf And Galadriel's Help?

gamerant.com:

As with any film adaptations of well-known and well-loved books, there is going to be some deviation. Although Peter Jackson’s movies are as faithful as possible, there are definitely some scenarios in the original texts that didn’t make it to the big screens. Some of the most important of these include what happens to Saruman after the corrupted Isengard is reclaimed by the Ents, and the events leading up to the Scouring of The Shire, when the hobbits come back from their long quest to find that their beloved homeland has been destroyed.

But the journey back home from Ithillien, where they rest after they are rescued from the crack of Mount Doom is a long road, and as they make their way back, they are accompanied by a few friends. They part from Gimli, who returns to the Glittering Caves, from Legolas who seeks Fangorn Forest and the talking trees there, and from Aragorn who has taken up his rightful place as the King of Gondor.

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These 3 companions later re-group to re-build Minas Tirith, but the hobbits are accompanied by Gandalf and by Galadriel, whose paths still lie in the same direction. But as they go, they encounter a familiar, yet not so friendly face. Saruman, dressed as a beggar and wandering alongside the cowering Wormtongue, are found headed in a mysterious direction, trying to escape Aragorn’s lands, lest they be brought back to Isengard for justice. When they are spotted by the travelers, Gandalf asks “Will you scorn our help? For we offer it to you.”

At this, Saruman sneers, still having an air of superiority even after how far he has fallen. He basically suggests that he would not choose to accept their help even if he was moments from death, he would