They are not in Kiev because their goal is destruction of the AFU. Once the AFU collapses, Russia will be able to take whatever territory they want when they dictate the terms of surrender. Meanwhile, the only western source that shows any methodology has this to say about Russian casualties https://en.zona.media/article/2025/09/12/casualties_eng-trl

The fact that you think Russian modern tanks are gone shows that you have absolutely no clue regarding the subject. https://militarywatchmagazine.com/article/returning-tank-production-soviet-era-levels-russia-over-3000

Of course, there's nothing that can be said to you that would change your views since you're clearly living in a fantasy world. You'll just have to wait and see how this ends for yourself. Prepare to be very surprised.