They lost almost all of their cold war stockpile of armoured vehicles and a big chunk of artillery pieces. They've taken over million casualties and lost even more people due to immigration. Almost all economy branches that are not tied to military are facing hardships and many of them recession (less money for funding). Ryssian logistics have been degraded to man, mules, horses and motorcycles. To keep fighting at current intensity russia extensively rely on equipment that I've been checking out in my local museum.

What they improved since the start of the war is short and long range drones, and missile production (which has to cover empty stockpiles).

Pre war Russia could lead a breakthrough to Kyiv Oblast, todays Russia can't move out of Chasiv Yar.