Well this incident as well as subsequent reactions was widely circulated on the Chinese news media next day from different perspectives.
Take for instance these articles from Chinese MSN, Sina and QQ (largest online portal for China)
http://roll.msn.com.cn/roll/20140221/1012246485.shtml
("宿敌"日本记者为金妍儿鸣冤:在平昌她必夺冠
Even Arch Nemesis Japanese Reporters claim unfairness for Kim: At PyeongChang She'd have won.)
http://sports.qq.com/a/20140221/003431.html
(欧美记者追问俄冠军:哪个动作做得好分数高?
EuroUS media confront the Russian Champion, which element do you think deserve higher score Translation below)
http://sports.sina.com.cn/o/2014-02-21/06047032710.shtml
(Sina News 女王再见!金妍儿留下最优雅背影 钢铁蝴蝶经典永驻
Queen Goodbye! Kim Yuna leaves most elegantly, Classic Iron ButterFly Forever)
http://sports.qq.com/a/20140221/002923.htm
(金妍儿配得上冠军 她输给俄主场优势
Kim deserve to be the champion, she lost to Russia home advantage Zhang Dan comments.)
I can only speculate Adelina left early because she felt uncomfortable with the line of questions. In the report, they mentioned when Sotnikova walked into the press room, the entire Russian presscorp wildly applauded but awkwardly no other international reporter clapped for this 17 years old young lady. Earlier in the media room, international press were dumb founded at the scores, with a member of the Japanese media even joked "If this had been in PyeongChang, Yuna would have easily got the gold" hint Russia's home advantage was the reason.
The report said:
An editor from a major sport paper remarked although Adelina performed well, she did not land clean, Yuna was almost flawless so he did no not understand the score. Japanese and Korean press has never got on well together, but even Japan were calling foul on her behalf.
“冠军的分数实在是太高了,你不觉得么?”赛后混采区,《产经新闻》记者这样对记者说道。“金妍儿的表演非常完美,她配的上冠军。”该记者这样说道,力挺金妍儿。
Comment over heard from Japanese press members (Sankei?) "The Gold score is so high, do you think it was deserved?", "Yuna Kim's performance was excellent, she deserve the gold" come back the reply supporting Kim.
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In the press conference report, Sotnikova got asked "Your TES were 5 points higher than Yuna kim, which of the jumps, spins do you think deserve such high marks" Some European/American reporter challenged her.
"Today I told myself, to trust myself and enjoy the competition...." Sotnikova replied trying to avoid this question. The reporter was not satisfied, he pursued the same line of questions. "I think I prepared well, and was focused more during the competition" Sotnikova frustrately answered.
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Personally I wish someone just post the whole press conference and leaves the reader to make their own mind up.