Russian here (British, living in UK for over 20 years).
The whole thing is outrageous. To invade Ukraine for most Russians (and Ukrainians) was unthinkable. And yet here we are.
All of ex USSR is interconnected with family relations and friends. Ukraine especially. My father is from Ukraine and my Ukrainian grandma lives with my family in Russia. I've been to Ukraine many times as a kid. Nothing, but good memories.
This war is like a rape of your own family. Sadly a lot of Russians in Russia are brainwashed by the media, propaganda, etc. and will try to justify this invasion. I almost fell out with my younger brother speaking with him today...
I'm angry and sad.
Please remember a lot of Russians are against it and some will even protest, but opposition is suppressed, often with severe consequences.