Anyone claiming the Russian economy isn't collapsing, what else would you call a 50% drop in stock prices over 5 years, and that's measured in a ruble that has also lost about 40% value to inflation in the same period of time.
That means that in "real" money Russian companies have only 30% remaining of their value 5 years ago! Most other places we would call that a crash, although it has been kind of a slow crash.

National budgets are at a deficit, and Russia can't borrow money, because nobody trust them.
Of course a country continues as best they can, but Russia today is very far from what they were 5 years ago both economically and in their industrial capacity, and the war chest Putin had saved up over a decade is practically gone. Yes on paper there are some assets left, but those assets cannot be monetized for various reasons, so the access to the war chest is basically zero now.

This is why Russia has plateaued in their war effort, while Ukraine has steadily increased production capacity, and is in a way more healthy economic situation.

Yes economics may seem boring to some, but it is the ultimately determining factor in a war of attrition. And Ukraine is 100% winning this with the help of many allies across the world. Notably missing is of course USA, which is also part of the reason USA is declining as a global super power.