So when does the destruction of Ukraine start? Because after Russia's annexation. The only real destruction has been in Russian lands.
Even before the annexation the damage has been limited to various pieces of the border territory.
Nothings been destroyed. Ukraine is still running air sorties, so at least some airfields are intact. Ukraine is still able to supply its front lines, which means their logistics, rail and/or road, are still intact. Those would be the first two things taken out if your plan is to destroy the country. Major population and industrial areas outside the border havent been touched, which is where Russia would get the bang for its buck.
If the whole point was to see Ukraine destroyed the west would only supply enough to keep Ukraine in the fight, but losing. So that more and more territory was hit. By arming them to the extent that we have we are ensuring very little gets destroyed.
Your theory is not supported by any evidence, which is why it's a crackpot theory.