I don't know where you heard that. The media keeps reporting that Russia is losing the war, or may be losing it,* but that it is likely to drag on for a long time. No one that I have heard from since the first weeks of the war has ever said or implied that it was about to end.

* As Russia changes its aims, the definition of "winning" changes. This is a separate way Russia can win: declare victory with whatever territory you have seized and call for peace negotiations.

This is hilarious because all reputable media won't even report on most of the progress because they can't independently verify the information given out by the parties at war. Thus we get this big lack of actual news about the war which can't be filled by people on Twitter and Reddit translating from Telegram and random videos.