Ukraine is winning, just not as quickly as we’d like.
I know some speculate that the west is interested in drawing this out, to bleed the Russian military as much as possible.
But this war is harmful to the west too, most obviously the economy is generally slowing down because of the increased energy cost. Also hunger in African countries could increase unwanted immigration to the west. That’s apart from the purely humanitarian aspect, of innocent Ukrainians suffering the worst of it.
Of course if you are cynical enough to want the war to drag on, the humanitarian aspects are probably irrelevant. But even for the cynical, there are reasons to want Ukraine to win quickly. The Russian war machine is already ruined. Both their capability, but more importantly the poor performance should make any Russian leader think twice before using it again.