I will return to the discussion that the Kremlin is apparently aiming for a relatively quick military solution in Ukraine instead of gathering its forces and trying again in the spring.
Or at least that's what you can conclude from the fact that worn out units are not pulled out to get rest and be replenished, but are thrown back into the frying pan. Also, new recruits conscripted in the mobilization are not properly trained or equipped, but are instead sent out to the front lines right away.
The Kremlin has clearly become aware that Russia is not capable of conducting a prolonged war, but that some critical resources are bound to run out. Later history alone will reveal what exactly is the Kremlin's situation right now, but along with the ammunition shortage and equipment problems, at least the following factors will certainly be known.
First, the death of technology. When Western imports stopped, the conditions for continuing production also ended for much of the Russian industry. There are no more components for industrial products, but also no spare parts for the equipment that are used in manufacturing those products.
The situation in the aviation industry is illustrative. When Putin seized the planes leased from Western countries, aviation technology experts circled the date on their calendars when some of these stolen planes would have to be dismantled for spare parts for others. So that even a part of them could be kept in the air.
And those experts were absolutely right. That date was in August and the planes have already been "cannibalized". Sooner or later, Russian domestic planes will start falling from the sky.
A similar cycle of gradual disintegration is now underway throughout Russia. Special elevators, industrial machines and equipment... Everything is soon капут. Including the equipment of the oil industry, of which Russia is completely dependent.
Another phenomenon is the shocking loss of population. Putin has not tried in any way to prevent leaving Russia. Even more, he has emphasized in his speeches that if dear Mother Russia is not to your liking, then you can get the hell out. But apparently he didn't realize how many people would actually choose the latter option.
Since the beginning of the mobilization, up to 900,000 people have left Russia. The next even number is a million. The scale of this population flight is beyond comprehension.
And, of course, those who leave are exactly those who would be needed within the country. That is, people who have the education, skills, health, and financial means to leave. In other words, there will soon be only babushkas and burlaks left on the Russian labor market.
Good luck running a war economy with that.