The source is unbiased and objective in terms of demonstrating that the majority of Ukrainians support the fight against the Russian invasion.
I don’t expect moral perfection from a country that is fighting for its survival against a more powerful aggressor. Yes, conscription is awful. Ukraine has allowed many exceptions but the alternative is to surrender their country to the real ghouls here, which is the Moscow regime that has raped and murdered innocent civilians from Bucha to Mariupol.
There would be no need for conscription if Russia had not invaded Ukraine, and conscription would end tomorrow if Russia would turn around and go home.
I hate to break it to you, but those aren't unbiased sources. The regime in Ukraine has banned all opposition parties, and any independent media, and it regularly jails people who speak out against the regime. Pretty incredible that you can't understand why polling under such conditions makes no sense. However, the fact that they cancelled the elections should make it pretty obvious to anybody with a functioning brain what the level of support actually is.
Of course it is challenging to conduct polls during wartime. Countries tend toward authoritarianism when they are at war. But unlike the invaders, Zelensky’s government was elected in free and fair elections in 2019. This election, as well as the Maidan protests in 2013, make it pretty obvious to me that Ukrainians support their independence from Russia.