Well, I think Zelensky failed spectacularly in the runup to the war.
If the US government is telling you that Putin is serious about a war, and you can see over 100,000 Russian troops deployed on your borders, the sensible move is to take such a threat seriously rather than continue to poke the bear.
Because the US "prediction" was a load of bs, they predicted something and then they forced it to happen by shelling civilians and threatening a full scale attack on the separatist areas. It's like Hitler in ww2 proclaiming that Germany is about to get attacked by the Allies... After they struck first on Poland. Of course your "prediction" is correct when you knew the other side's red lines and still attacked.
Without Zelensky sabre rattling, there would be no war. And without US ordering it, there would be no sabre rattling from Zelensky. And if Zelensky refuses to follow orders, what do you think would happen to him and his family?
America's plan was simple, they ordered all state connected media to blast "news" about a Russian attack, therefore giving the Ukrainians ability to do whatever atrocities they want and gain ground without Russia retaliating, because they thought Russia would be scared of falling into their "prediction". This approach is typical of USA salami slicing strategy.
But Putin had his own plot which was meant for a situation like this.