I can see that it's an emotional topic for you and that you have deeply held beliefs about what happened. Being so closely involved and more than likely partisan, as your reaction suggests, puts your views under more pressure than most to be objective about the events prior to the 2014 revolution (or coup depending on your sources of news). I think the best way to find out who's involved and possibly why is to follow the money. The US and some EU member states have poured billions into the Ukraine (via some very shady accounting and avoiding disclosures in order to hide who exactly much of the money went to); something they are unlikely to do without expecting some kind of return on their investment. And the "why"? Possibly because bring the Ukraine into NATO would put them at Russia's doorstep and would also mean billions of dollars in weapons systems sales for the foreseeable future. There's also the strategic military importance of the Crimean peninsula to the Kremlin.
A lot of what happened in the years prior to 2014 look like they came directly from Gene Sharp's booklet "From Dictatorship to Democracy," which BTW was also used in the joint US + Saudi led undermining of the Syrian regime. I can remember some documentary reports of Ukrainian activists openly declaring that they were using the booklet. This has the CIA's fingerprints all over it. It's what they seem to specialise in.
In the world of geopolitics, nothings ever what it seems at face value. Unfortunately, the poor Ukrainian people have had to bear the brunt of this power struggle. They have a saying in India, "When the elephants fight, it's always the grass that suffers most."