One - all the coup leaders had to do was wait until January, 2015 for the next scheduled election and then legally boot him out.
It is obvious (imo) that they thought they would lose the legal election, so they staged a coup so that they could take over (or they were just monumentally stupid). Sure Yanukovych was very corrupt. They knew that he was extremely suspect when they elected him - he was a multiple convicted felon (when he was young). But all they had to do was wait a few months...it's not like he was murdering people or starving them to death.
But the coup cost numerous deaths.
Viktor Yanukovych - Wikipedia, the free encyclopedia
Two - the coup was blatantly illegal, yet Obama screamed bloody murder that the referendum in the Crimea was illegal and thus invalid. So why not the illegal coup in Kiev?
The coup was carried out by thugs and/or idiots (imo) who were urged on - either directly or indirectly - by the West.
And what did it accomplish?
Many people were killed in the coup, the Crimea was lost and this bloody civil war in the breakaway region is raging...and for what?
Because they couldn't wait a few months to legally boot their corrupt leader out?