Yanukovich was a pro-EU candidate himself, he wouldn't have been elected otherwise, it's just he wasn't anti-Russia like the other guy.
Missed the part where Yanukovich had protest fired upon by his police injuring over a thousand and resulting in dozens of deaths, that was kinda a major factor in his fleeing the city a couple of days later and being impeached in absence
Common internet myth based on Russian misinformation, what actually happened was that they voted to repeal a 2012 law that gave Russian, Hungarian, Moldovan and Romanian languages the legal right to be used in courts/schools/institutions in areas where the corresponding ethnic minorities exceeded >10% of the population, however the vote was vetoed a couple of days later by the acting president. Of course when Russian media started broadcasting the news to Donetsk/etc they went wiht the story you have heard.
People had a choice, they elected a president who promised to sign it, they repeatedly polled in favour of it, and removed by force the president after he refused to sign it.