let's not mention the Russian population of Ukraine, who were never asked about joining Ukraine but given to an artificial country and treated like shit, being shelled and attacked since 2014.
Just thought I’d address this bit.
Guess what: the claim is false.
Even disregarding the laughable notion that Ukraine is somehow special in being “artificial” (every country is!), the fact is that the Russian population of Ukraine *was* asked a version of that question in the form of the Ukrainian independence referendum in 1991, along with every other Ukrainian.
And guess what?
They voted for it.
The Russian speaking Ukrainians? In favor. The ethnic Russian minority themselves? Also in favor.
Hell, even ethnic Russians in Crimea, later on a very separatistically inclined group, narrowly voted in favor of Ukrainian independence from the USSR in 1991. Even they did; let alone the people of, say, the Donbas.
Those views changed later on, of course. But that doesn’t change the fact that they were initially asked whether they support Ukraine becoming independent (with them as its citizens), and most of them said ‘yes’.