I think this neglects that:
(1) Putin has painted himself into a corner from which there is no way to back down and save face, period.
(2) The most likely reason for this is that his entire regime is dysfunctional because he has already gone crazy, specifically in a way repeatedly seen in authoritarian rulers where paranoia over disloyalty results in punishing unwelcome news harshly as disloyalty, punishing welcome news that turns out to be inaccurate later harshly as disloyalty, punishing excessive visible success which leads to others achieving a personal following as disloyalty, an punishing failure as disloyalty.
That ship has sailed. He was given multiple opportunities and picked up none.
Imo, Putin is more analogous to GW Bush with the invasion of Iraq and Afghanistan. Can you make a claim for how Putin is worse than even Bush in this regard?
They have zero seats in parliament and no political influence.
No one is saying nazis aren't bad. But so long as they're killing invaders, it's an acceptable evil.
This is not to mention C14 or the свобода (Svoboda) political party aside from the Azov battalion. They have an outsized influence in Ukrainian politics. This is one of the main reasons why they won't concede on NATO membership to end the war, US interests aside.