ussia cannot win this war.
There isn't even any clear rationale for why it's happening....
The original invasion was based on a premise "Ukrainians are really russians who are confused and they will welcome a return to rule from moscow" that turned out to be completely wrong.
Only idiots and paid trolls believe russian rationales about 'nazis' (per capita there are far more nazis in russia) or a 'russian language ban' (usually propagated by those who speak neither Ukrainian or russian) or 'pro-russian separatists' (they were russian, like Girkin who began the invasion of Donbas in 2014).
No one with any knowledge of russian society or who has a 3 digit IQ believes it was about NATO (all it has done is make NATO stronger than ever).
So what are they trying to accomplish?
Even russians who loiter around here can't articulate any real way in which russian military involvement in Ukraine is good for either country... they simply regurgitate government lines they have been told to regurgitate.