What then would you have Joe Biden do? Impose sanctions against George W. Bush? Freeze the bank accounts of Dick Cheney? What would be sufficiently non-hypocritical to satisfy you?
America is not a dictatorship (yet) and President Biden is not singlehandedly responsible for everything that America has done in the past two decades. His power to throw America’s war criminals (mind you, these are individual people and not America as a country and certainly not Biden himself) in prison is rather limited. I am not saying to give up on the idea of pursuing America’s war criminals. I am saying what would you have Biden personally do about them before he can take action against Putin?
Because without that side of things, you just come off as contrarian. If two murders happen and the police arrest only one murderer, do you say that they should not have arrested the one because they did not arrest the answer? In this analogy, you treat Biden like one of the murderers, but he is not.