Man I don't think that's true at all. It's like being a foreigner alone in a foreign land but not even knowing that anybody else you could possibly communicate with and who would know about your world and even be able to speak to you, let alone treat you as though you were sane, existed. So somehow she gritted her teeth and learned Japanese, somehow got a relatively alright job, managed to get an apartment somehow - we still don't know if she shortcutted any of that or not - and then suddenly she sees people who know what she's going through, who maybe could get her back to her world, with the people she cares about, a land that's familiar to her - but it's the worst possible people she could meet. And then she's prepare to fight them, but they have zero interest in it whatsoever - in fact, she's pretty much no threat to them at all! You know how powerless you would feel there? Back home, she was, well, the hero of the land. Here she's fallen as low as these jerkbags, and they're the only ones who even have an inkling of what she's going through.
And she wasn't afraid to walk home - she didn't want to sleep in the streets. She lost her wallet and couldn't take the train home.