Now, jeez, with the "ethnic Russian" definition expanding to include half the population and "ethnic Ukrainian" being narrowed down by jerks like Right Sector and other "nationalists" I don't see how blaming things on Russia or the EU makes much sense. Both the EU and Russia have been stirring the pot, but Ukrainians brought it to a boil all by themselves.
A country the size of Ukraine with eighty plus political parties represented in the Parliament is a train wreck waiting to happen. Even India has to have over a thousand parties only has something like fifty that can be on a national ballot which compared to the size of the population isn't nearly as messed up as Ukraine.
My memory on India may be faulty, but still, compared to the population, over eighty parties represented in Parliament? That's why the only time they agree on anything is when an armed mob has them surrounded.
The two major parties in the USA are coalitions that paper over a multitude of ideological differences. Consider just the Republican Party — it is actually a coalition of: Paleo-Conservatives, Neo-Conservatives, RINOs, CINOs, Log Cabin Republicans, Tea Party Republicans, Country Club Republicans, Social Conservatives, Conservative Libertarians, Libertarian RINOs; and, who knows how many other factions.
In countries with some form of proportional representation, there are always a greater number of parties — but, each is more unified in ideology. Coalitions are formed after elections. That system at least has the advantage of some transparency. It also ensures that most people can find someone they actually want to vote for, and that their views are represented in the government. The larger number of parties is more likely a strength than a weakness.