We've seen Russians will fight without proper clothing, without transport, without proper medical equipment, without decent food, without training, without proper leadership. They fight with sheer numbers.
But what's the one thing the Russians absolutely NEED?
They cannot function without ammunition. The Russian army is not a limitless horde of convicts & mobiks, it is a finite supply of bullets and shells. Without ammo, all the manpower on Earth can't do fucking shit.
To use a Die Hard saying, "Shoot the glass!". Home in on the Russian ammo supplies. The depots, the stockpiles, the manufacturing, the fucking foreign imports, the shipments on trains, the shipments on trucks. Sanction it, destroy it, fucking steal it.
Russians are so fucking wasteful on ammo to even crawl forward, that the more ammo is taken from them, the less dangerous they become.
No ammo = no threat.