The Fact that Russia has continued to treat the Ukraine as their property and inflamed distrust and rebellion wirhin it's boundaries seems to escape you. They were well on their way to becoming an advanced free western nation and Russia thought they could stop all that progress. Once people have a taste of freedom they can never go back to slavery. That's the bottom line.The fact you ignore is that Russia was provoked to invade Ukraine by the US and NATO as part of a decades-long campaign to destabilize states that border Russia or the USSR:
Jeffrey D. Sachs - How the CIA Destabilises the World - Brave New Europe
"Since 1975, the CIA has run secretive operations backing Islamic jihadists in Afghanistan that utterly wrecked Afghanistan while giving rise to al-Qaeda.
"The CIA has likely run secretive operations in the Balkans against Serbia, in the Caucuses against Russia, and in Central Asia targeting China, all deploying CIA-backed jihadists.
"In the 2010s, the CIA ran deadly operations to topple Syria’s Bashir al-Assad, again with Islamic jihadists.
"For at least 20 years, the CIA has been deeply involved in fomenting the growing catastrophe in Ukraine, including the violent overthrow of Ukraine’s President Viktor Yanukovych in February 2014 that triggered the devastating war now engulfing Ukraine."
For its entire existence the CIA has functioned as Wall Street's enforcer dedicated to advancing the interests of the greedy parasites that control the US Government. Ukraine is simply their latest proxy.
Casualties of the Russo-Ukrainian War - Wikipedia
"Casualties in the Russo-Ukrainian War included six deaths during the 2014 annexation of Crimea by the Russian Federation, 14,200–14,400 military and civilian deaths during the War in Donbas, and up to 500,000 estimated casualties during the 2022 Russian invasion of Ukraine."