How may of them chose to fight in the first place, aside from the neo-Nazi ones? Many of them were conscripted and forced to fight.
How many of the women & children & old men want the fighting to continue? The Ukrainian government is a shit government; how committed even are they to its survival? This is a post-US coup government that has banned opposition parties and is auctioning the country off to foreign capitalists. All of the aid they’re getting is lend-lease, which they will be repaying for generations. This is going to be full-on neoliberal shock therapy.
To what extent does the Ukrainian government have a choice in whether to continue fighting, when the US clearly has a lot of say in the matter despite its claims to the contrary?