The Parliament isn't unelected. And Yanukovich's bid to make himself President-for-Life is not very different from Chile's Salvador Allende's attempt to entrench himself in power by nationalizing everything in sight, including the press.
Reportedly, MPs are forced to vote as they are told. They are physically assaulted, and their families are held hostage. In the photo below the governor of Volyn region was nearly killed, then dragged to the local Maidan and chained to the post:
What kind of legitimacy can be expected from a lynch mob?