A charismatic leader who will challenge you is one way to lose power. Another one is getting chaos in your country and having it break apart into a large Somalia. Returned dissatisfied "heroes of SVO" may create a crime wave that will make gangs of 1990s (largely made from Afghanistan war veterans) look tame.
Not gonna lie, I find myself thinking back to this message, because it ended up changing some pretty fundamental beliefs I had about the war.
I do still believe that if America just stepped in at least a few months after Russia first invaded, they would have been able to kick the Ruskies out without suffering any nuclear retaliation and minimal casualties since Russia's military is so inept. The angle Putin had been pushing with his propaganda was that NATO was this all-powerful conspiracy hell bent on hurting Russia's ambitions (I wish it was, oh how I wish it was), and an American counter-invasion would have played into that. Putin would have been a loser, but that just meant he would go back to chilling in his villa. It wouldn't be something to start a nuclear war over. He wouldn't have been disgraced. An overwhelming American victory would hide the fact that the Russian military is an embarrassment and also put a damper on any future expansionist ambitions Russia may have had.
Instead, we have dragged this war out for many years. The sanctions we put on the country forced it to cannibalize its internal economy to create a war economy and now they have no choice BUT to continue the war or face the collapse as described in the quote above. It's too late to scare Putin off with a show of force. He may actually be desperate enough to use the nukes this time. Everyone was hoping that if they waited long enough, the sanctions would lead to regime change, but nobody expected it to happen to the West instead. With crucial allies now compromised, Russia has never been closer to victory.
The West thought they could win a war without fighting. Instead they got even more bloodshed.