Have you a link? Not trying to be confrontational but I'm genuinely interested in what happened here.
AFAIK, there's a video of Yuna answering the last question of the press conference (I don't have the link on hand); the camera zooms in on Yuna when she starts to answer, and Adelina is there when she starts to answer but not there when Yuna finishes.
And as far as I know, there's no video of Yuna's interviews the next day when she was asked about Adelina's leaving. Yuna's response was that typically the medalists finish and walk out together, but Sotnikova left. Yuna also pointed out that Adelina got there before her and was answering questions before her, and that Adelina still had her dress on. Yuna said she wasn't sure what was going on when Adelina left, but it was up to the skater to do what they want to do.
I don't see why what happened is a reason to hate on either Adelina or Yuna. It just seems like a non-issue to me that fans on either side are distorting.