THANK YOU! It's like everyone else just glossed over what SHE was trying to accomplish as a whole just to share their opinion about how cringe-worthy the end was. That was the whole point.

Lml I can't!

I thought Toph can see them through her advanced bending, like notice their movement when they breathe. Plus, Toph is the original metal bender; I'm sure that Kuvira isn't that brolic yet. My guess is that they kinda cheat to beat her.