Are you for real? On day 1 of this conflict, NATO cable Zelenskyy to cede Donbas to Russia in order to avoid a full blown war because NATO didn't see anyway Ukrainian can fight this off, then when Mariupol is surrounded NATO talking about letting Russia have Mariupol and the Land Corridor. Now, 110 days has pass, we are still talking about this war.
In fact, Biden allegedly said that even before the war begin
Problem is not whether I believe 1000 soldier has been killed, what I see is Russia have a high turn over issue, otherwise they will not raise the age to serve now to 50 and will not try to raise Battalion out of nothing. Unless you can tell me why these measure is in place that's logical, that point to the Russia have force generation problem. Which usually mean they are upping the tempo or have had a lot of casualty they need to replace. If this is the first one, we would see an expanding of battlefield and more equipment roll into the war, and we don't see either of them.
I don't know how many soldier Russian killed in this war, I can take an educated guess from Open Source resource to have a ball park figure, but I wouldn't say the war is going smoothly toward the Russian, judging from the stuff that they do and reading it between the line.