

I don’t think that Putin is “delusional,” he is just trying to do what Russia has been trying to do for centuries - destroy Ukrainian culture, identity, independence, in short, assimilate Ukrainians. And withdrawing troops from Ukraine will not be such an easy decision for Putin and Russia, after several years of full-scale war, that is.
In addition, there are many Russians who are waiting for their country to crush the “Banderites” so ending the war could also hit Russia government hard, in my opinion.