There’s still a chance. They didn’t get Bumi.
Kya says this- they’re beaten and tied up and on the verge of the end of the world and all the benders in their group are tied up and it looks hopeless and thats what everyone is thinking
because Kya knows her big brother
the big brother that taught her how to swordfight
and scared off her ‘suitors’ when they were kids
who kissed her on the forehead and asked her to be proud of him when he went off to join the United Forces
the big brother that’s a big doofus and has ridiculous stories and even though she makes a face she always listens because he’s Bumi and there’s actually a point to his stories
Kya had faith in her big brother, and it pays off.