It has nothing to do with blinken. Ukraine has predictably sent all the reinforcements it can muster from the rest of the fronts while the advance continues in those other areas. When reinforcements arrive the front line moves slower.
It was never an offensive. It was only ever an opportunistic advance to stretch out Ukraine's defences and maybe make a buffer zone to stop Ukraine from shelling Russian civilians and infrastructure. Russia only deployed a relatively small amount of troops.
Your doomerism is comically misguided.
ASAP. There are enough accidental pregnancies happening in the world that every request for sterilization should be honored. Its also reversible procedure. Even if its harder to undo its easier to fix than an accidental pregnancy.