We're all just reading on the internet. We don't have any idea what's actually going on, no sense pretending we do and judging any of these kids. Besides, even if there was tension between the three girls at Eteri's. They were growing up hearing every day, "you are replaceable", "only one of you will win glory and money and the rest will be nobodies", "I don't care if you win because your friend will". That does damage. You cannot as a coach demand constant ruthless competitiveness on the ice and expect a bunch of little kids to just 'turn it off' when you want them too. Not how developmental psychology works.
If we are all just reading on the internet, why are you claiming to know Eteri said these things?