A pretty fair point but I still think you are neglecting a few things.

Firstly, while according to this study by the Kiev international institute of sociology most Ukrainians do still support the war it also indicate that the portion that peace at the cost of losing territory is definitely growing since the start of 2023, if I were to try giving admittedly loose and uncertain bound based on those numbers and assuming the rate of change don't shrink, I would expect this portion to reach 50% of the population 2 months from now at the soonest, 11 months from now at the latest.

An other related thing to consider is how accurately is the state of the war depicted in Ukrainian media? A state at war that don't plan to surrender has incentives to make their war effort as good as possible and the enemy's war effort as bad as possible and Ukraine is obviously no exception.

Depending on how distorted the narrative about the war is, these figures could be drastically different from what they would be if the Ukrainian public got a more neutral account of the war.

So do the Ukrainian want to continue fighting? For now yes, but I don't believe it will last.

Your leverage point is moot in my opinion.

As I said, it is a fact that Russia is winning the war and that Ukraine has decisively failed to push them back before the Russian entrenchment in their position and the dwindling military supply to Ukraine made doing so impossible going forward.

I'm not saying that Russia could just roll over to Kiev any day if they wanted, that would obviously be absurd, but the military situation in Ukraine, the state of western weapon manufacturing compared to Russia's and the sheer difference in manpower reserve and moral make it such that even if the west threw every last weapon in their stockpile at Ukraine, it would not change significantly what a peace deal between Moscow and Kiev could look like. I repeat therefor once again that the ONLY thing continuing to supply Ukraine with weapons is increasing the death toll on both side and prolonging the was for nothing, it's literally not doing anything more, let alone helping Ukraine in any tangible way.

You are right, though, that most of the aid to Ukraine is humanitarian and not military, and those absolutely should continue, but that's one reason more to not prolong the war uselessly, the end of the war would make helping the Ukrainian people way easier and would allow Ukraine to start rebuilding.