Zelenskyy straight-up said Ukraine is going to lose if Congress doesn't send more aid
(www.businessinsider.com)
Yeah, but Russia invaded Ukraine. So what should be done now.
If left to their own devices, Ukraine would be annexed to Russia and surrounding countries would be next. The casualties would probably be less here (not guaranteed) and the quality of life of the Ukrainians would drastically degrade.
If NATO sends boots on the ground, then it becomes a full blown world war with warring countries having lots of nukes. The casualties are enormous with a potential doomsday scenario.
Right now, NATO finance a proxy war. Ukrainians fight back and hard to shut out Russians. They need the tech and financing to do so. If they don't have it, Russia takes over and we go back to the first scenario. Casualties are high.
There is no good ending where Russia negotiate peace and return home. War fucking sucks, and there is no good answer.