I don't think it's fair to blame Eteri in Sima's case, either. Sima coped much better with competition under Eteri than after leaving. Perhaps we can say Eteri didn't fix her technical flaws radically, but how much could she do in only one year? Also there were quite a few factors influencing Sima's decision, like family issues, funding, chance to move up to seniors etc. As for Yulia, it's a more complex case. In short, there was serious lack of mutual understanding between Eteri and her, and the mini-competition inside the group may have added to the psychological pressure she was bearing. I feel both of them will have something to regret years later about how they could have handled their relationship, but there were factors beyond their control.