This isn't true though is it, in fact the bit it wanted isn't either, they wanted the whole country and got as far as Hostomel on the borders of Kyiv, they were in Kherson on the right bank of the Dnipro both of those have been more than penetrated, they've been regained in their entirety. Then there was the push on the Eastern Front that pushed Russia all the way back from Kharkiv. So the barely penetrated line is just demonstrably untrue