I read “Bureau” and thought it was a state institution, and she diplomatic corps. I have no idea who she actually is.
And, no, politicians taking part in demonstrations isn’t exactly unheard of in Europe. Also abroad. I mean for one you have to go to Belgium to protest the EU so there’s that.
She saying “yeah he should be prime minister” also doesn’t mean that she dictated that he should become one… a couple of years back I said that Biden should become President of the US. Does that mean that I putsched the US? Nah, it simply means that I think he’s a (vastly) better idea than Trump.
And in any case none of that matters as there were elections quickly after that. The interim government was in power for only a short while, and btw right-wing parties lost heavily in those elections, and elections since. Any iffiness that may or may not have existed during and directly after Maidan was cured afterwards, as befits a democracy, by elections.