Putin is an incompetent dictator obsessed on Ukraine. He has no way to back out, the only thing he can do is kill Ukrainian citizens.
I think he is pretty competent but it is true that Russia and he himself has no way back out. Russia has to finish Ukraine to stay independent.
Russia can not allow that shit you do go unpunished. And if we need to kill ukrainian soldiers for that so be it. Their deaths are on you and ukro-regime you installed. Georgians were punished and learned their lesson, so will ukrainians, eventually.