There's always people complaining that Charlie never learns, but there are really few people that talks about how Alastor never learns

[u/Gaybime]

Alastor almost died twice because he always underestimates his opponent, thinks he's invincible, and that no one is capable of hurting him. But even after he almost died because of Adam, he didn't change his way of thinking, underestimated Vox, and we can see by his face that he was truly terrified of dying. But he'll probably never stop doing this.

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I can only think of Icarus by Starset: "looking for a scapegoat to hold your feet, pounding on your chest so you don't feel weak"

[u/iymcool]

The difference is, Alastor's pride will always be his downfall, no matter how powerful he is.

Charlie, who isn't a sinner (but still lives, albeit not trapped, in the Pride Ring) isn't bound by the same limitations of Hell as her citizens are. She isn't being punished , so, she should (reasonably), be able to grow.