Gilbert Doctorow: "...the Russian military is very quietly telling us that it is now deploying stealth bombers into the war zone. Initial flights have demonstrated their ability to operate over Ukrainian controlled territory without being detected. If this practice is now generalized, the Russians will finally enjoy the air superiority that has been the feature of US and NATO operations in war over the past thirty years or more."
The 'west' is currently unable to produce as much ammunition as Ukraine wants to fire. And while the U.S. still has some Bradleys and Abrams battle tanks in its reserves the depots for 'every weapon' in other NATO countries are already empty. There are no more tanks, armored vehicles or howitzers they could give away.
In total there simply is not enough to replace the losses the Ukraine has on a daily base. Meanwhile Russia is already producing more of every weapon than its military needs for its daily operations.