To be honest, I was thinking that she was fucked too. I mean, narratively it seems like she was supposed to win, but... unless this raksha army runs at the first sight of real resistance (which would be entirely reasonable, actually - opportunistic pillagers don't often like anything that even looks like a real fight) I didn't see her winning that one. I don't think the intent was to show it as pointless, though, or at least if it was it wasn't well-communicated.
"And then she died and everyone else did too" would be a shitty ending to a story that demonstrates how Creation's heroes can make a difference. This story is just the beginning of Janest's legend.