If Putin wanted to take Ukraine, it’s my professional opinion as a former SEAL, they could, and easily. Allow me to put it simply on the whiteboard for you.
“Never think that war, no matter how necessary, nor how justified, is not a crime.” -Hemingway
Putin has the capability, put in simple terms below, to completely annihilate Ukraine if that’s what he really wanted. We’ll get to that in a minute. This is how Putin should have done it if his objective was to take Ukraine outright.
Identify key strategic infrastructures like communications, power, command and control leadership, and then destroy them completely. Then take out the Ukrainian President and his advisors with strategic airstrikes, or send in Special Ops teams to decapitate the government.