Butan, you're barking up 2 different trees here:
The Maydan movement/government of Ukraine and possible relations to the EU/to Russia are completely unrelated to the Russian forces and the violation of Ukraines borders.
Change of government, and it doesn't really matter how this happens, does not change the borders of a country. It's that simple.
So, discussing who's worse is nonsense when you make a correlation of 2 completely different things.