Russia literally intends to annex (as in, turn into own territory) 4 Ukranian oblasts, banning ukranian language there, turning over capital to its own oligarchs (or their cronies), all via a means of war. I would like to remind you that Russia is an authoritarian capitalist oligarchy, with overt ambitions of turning itself into an empire. This definitely fits at least multiple definitions of imperialism.
I despise the shit that Ukraine did to its eastern regions for many years. What Russia is doing now is worse on multiple accounts (human suffering, death count, material damage), though.
All the same can be said about current Russian invasion. US-backed coup wasn't great, Ukrainian attitude to its eastern regions was atrocious, but Russia invading with full force didn't help anyone but wealthy Russian elites (and perhaps corrupt ukranian elites too, not 100% sure on internal ukranian politics): it destroyed yet more regions of Ukraine, killed yet more people, and there's no resolution in sight except for a slightly different frontline.