This is just a reiteration of what we've already seen in the russian empire and in the USSR

Comparing the Russian Empire and the USSR is the most ahistorical thing you can possibly do. During the Russian Empire and for all of history before that, Ukraine was a people without a nation. Oppressed, without representation, without borders, without a right to education or even learning to read in their language.

The Bolsheviks, with their first constitution in 1917, granted the right to self-determination and secession to all peoples of the former Russian Empire, which Lenin referred to as "the prison of peoples". Quite literally after Poland seceded in this legal fashion, the Polish government decided it wanted to return to the Polish-Lithuanian Commonwealth borders, and proceeded to unilaterally invade Ukraine and part of modern Belarus. It was the Red Army of the Russian Socialist Federation of Soviet Republics, that fought off the Polish invasion and established a lasting Ukrainian People's Republic for the first time in history.

This wasn't without controversy: while Lenin argued for the right to representation and to a Ukrainian Republic within the USSR, others like Rosa Luxembourg argued for a united, more homogeneous sort of socialist soviet nationality that outgrew former nationalisms. It is partially thanks to Lenin that Ukraine ended up having its own borders, administration and representation.

I know what you'll say: "but Holodomor! Genocide against Ukrainians!". The famine of the USSR was a sad and unintended consequence of bad policy during the collectivisation/dekulakization process of the early 30s. Millions of people died both within Ukraine and without it, especially as well in Central Asia and southern Russia. As bad as it was, and as avoidable as one can argue it may have been, there's simply no evidence of any intent of attack towards Ukrainian people, it's not precedented by anything similar, and it's not followed by anything similar in the entire history of the USSR.

In those decades and the ones to come, Ukraine would obtain and solidify its own nationality, people would for the first time obtain generalised literacy in their own language, the right to study in their language up to university level, a majority of publications (both journalistic and literary) in Ukrainian, and the very next president of the USSR Nikita Khruschchyov would be Ukrainian.

Attempting to construe a history of oppression of Ukrainians in the USSR is nothing but fictitious, anti-communist and russophobic propaganda, meant to create a divide between Ukrainians and Russians. There are clear geopolitical reasons to do so, and there are clear reasons why Ukrainians are very much afraid or simply hate Russians, because of the modern proto-fascist state that the Russian Republic has become. But creating a line between this capitalist country, the socialist USSR, and the feudalist Russian Empire, is simply an attempt to divide Eastern Europe further and to push Ukraine towards the EU and away from Russia. This point can be argued for without resorting to russophobic and anticommunist myths. We're smarter than this.