Currently, Russia target of conquering Ukraine has not been realized, while the Russian economy is slowly starting to experience a worsening crisis. Where will they get the food supplies for the soldiers to be able to successfully conquer Ukraine? or will run out of stock before that happens. there are several reasons why until now Ukraine is difficult to penetrate, first, the Russian army does not recognize the battlefield and the location of the snipers that have been prepared by Ukraine. Putin was briefly overwhelmed and now the invasion also deviates from the original plan for a 7-day ambush to overthrow power. Both Ukraine owns the media, and process all the news with the United States and NATO who have access to manage information. Many Russian media are blocked so that access to information will be minimal.
It may interest you to know that Russia has raw materials to build their own weapons most of the weapon used for the war can be produced locally in Russia. Consider the numerous ban and sanctions on the Russian Government but, they still persist and fight everyday to bring down Ukraine which have posed stronger than Putin thought in the first place before shooting missiles on their territory. Russia can stay longer on the attack despite the fall of their economy.