I believe in less than three months Putin's kingdom is over , what do you think?
False. Russia will hit until it will be able to do so. For russia (not only for Ukraine, yep) this was is existential. If it will fail - for russia this will means an and and country (as we know it) will collapse.
So, taking into account this information you could try to calculate the and of the war by yourself )
If you want to know more, you can read this guy -
https://twitter.com/kamilkazani/status/1497993363076915204