Russia has been sending the C-team all along.
They have the entire winter to move the A-team in for the spring offensive.
They are financially strong with new markets for their energy. The sanctions are gnats. They have been using all the old military equipment and green conscripts, saving the good stuff for the final push.
The US, on the other hand, has shot its wad.
It is amazing how idiots who saw what Biden did in Afghanistan believe his erratic warmongering with Russia will end well.
ditto