I've seen all the films and shows, thanks.Boba spoilers
Except he actually had a lot of character that the show didn't touch on, even after Disney's reboot. He blames the clones/Empire for helping the Jedi kill his dad. He hates Jedi for killing his dad. Neither is addressed in the show, and in fact Grogu shows up within fighting range of him and nothing comes of it. Fennec Shand outright killed his parental figure Taun We. It's never brought up in the show. Of all the history that Boba had, they literally took a bounty hunter who only interacted with Boba in one episode of the Clone Wars to be his final showdown.
In The Clone Wars, when Boba vows that he'll never forgive Mace Windu for killing Jango, Boba is still just a boy. Yet even at that point Boba has undergone a fundamental transformation, and he denounces his own recent actions, admitting that he's done "terrible things." (See "Lethal Trackdown.") This is an example that Boba is capable of growth and change for the better, and it occurs at the climax of his second season arc on TCW.
Much time passes between then and The Book of Boba Fett, during which Boba undergoes further transformation as he copes with his circumstances. To demand that in his middle age Boba not reevaluate what he believed when he was a boy would be quite absurd indeed.
Exactly.If a character cannot change or grow over the course of a story, there is no point in telling stories at all. By your definition, all literature should be little more than Wikipedia articles.
To insist that the beliefs, opinions, and even values of characters not change over the course of a story, much less over the course of multiple stories, is to fossilize them. Unyielding fixtures aren't characters; they're... fixtures.