Russia didn't take back the assets of YUKOS  allegedly 'stolen' from it. 
Putin trumped up fake tax evasion charges against YUKOS CEO, Mikhail Khodorkovsky, who is no fan of Putin's Orwellian dictatorship.  

YUKOS assets were divided between a select group of oligarchs beholden to Putin, who for a price, willingly do his bidding, if they wish to remain in positions of privilege under Putin's regime. As usual, the naïve Russian masses receive no tangible benefit in return. 

As for Crimea, its history and geography, in spite of various foreign occupiers, including Russia,   has been inextricably linked to Ukraine for over a thousand years, long before Muscovy existed. 

The root cause of friction between Russia and the democratic West is Putin's illegal military annexation of Crimea, not seen since WW11, and his  hybrid war in Eastern Ukraine employing thousands of Russian troops, Kremlin funded mercenaries posing as 'separatists' and hundreds of Russian tanks and artillery pieces.