I always found the god's anger kind of shifts from this pure, world-ending rage to something more nuanced. In the beginning, it's all thunder and wrath, smiting mortals for the slightest disrespect. But after the protagonist, this stubborn human priestess, keeps challenging his decrees, you start seeing cracks. His fury becomes quieter, more introspective. It's less about destroying the mortal realm and more about wrestling with his own irrelevance in a changing world.
By the final act, his 'anger' feels almost protective. He's lashing out because the old ways that gave him purpose are dying, and he doesn't know how to exist without them. The scene where he refuses a sacrifice, not out of mercy but out of a twisted sense of fairness, really stuck with me. He never becomes 'nice,' but you understand the loneliness fueling the storm.
It's a fantastic arc from a force of nature to a character grappling with obsolescence.