By HANNA ARHIROVA KYIV, Ukraine — When Russian tanks rolled into Ukraine in February 2022, the conventional wisdom was that the capital, Kyiv, would soon fall and the rest of the country wouldn’t last long against a much larger enemy. Instead, it was that narrative that quickly collapsed. The Ukrainian army proved it could slow the advance of Russia’s forces and, if not drive them out completely, then – with enough support from the West – at least forestall defeat. But nearly three years later, the outlook is again grim.