What character arc? She literally stopped her initial goal dead and is now sitting in one city literally sending out an army to kill those who she doesn't like. She said it best: "They can live in my new world or die in their old one." She's not actually thinking about getting around these difficulties. The only thing on her mind is "kill kill kill".A female character stops being a perfect sexy benevolent breaker of chains, comes up against difficulty that portrays negative character traits that can form an actual character arc, and suddenly she's a bitch. And people say the show is sexist.
Accusing me of being sexist because I don't like how a character is developing is a bit ignorant too.