They have already lost. Their initial goal was to take Ukraine, not a part of Ukraine, but Ukraine in It's entirety. They have no offensive capability left, so that initial goal lies in tatters. It's now just a matter of how long it takes Ukraine to boot them out. I'd guess by the end of next Summer, unless the political situation in moscow changes for the better.
The short arsed nonce, has managed to expand and unite NATO, the West is rearming itself, he will go down in history not only as a nonce, but as a paranoid, incompetent, war criminal of a nonce.
I bet with hindsight, he wishes he'd never even heard of Ukraine.