Russia hasn’t declared full mobilization yet. I suspect she was trying to avoid that, as the costs to the economy and social fabric will be VERY high. Imagine the US doing so.
The question is what resources are left to fight with?
Remember the Hypersonic missiles that were supposed to wipe out Nato? Those are mostly gone. When you buy ammo from NK and drones from Iran, things are not going as well as hoped.
Germany declared war on Russia in 1914, because the Russians didn't stop their mobilization. Nicky and his cousin, The Kaiser, even wrote to each other trying to stop it, but to no avail.
They are using old S300 battery anti-air missiles to strike civilian targets, as they have or shortly will run out of missiles like Kalibre etc. They just pulled all the S300s from St. Pete’s - they still have the S400 systems in place.