I don't think there's a need to get emotional about it and it is off-topic anyway

As for TitkTok, I have no idea, I never was there in my life.
As for Sasha Trusova, I don't think anyone said here that she was "promised" winning. She said many times including in the press conference in Beijing right after the medal ceremony that she always follows a goal, and now her goal was to land 5 quads in the Olympics FS, and that she was sure she would win OGM if she did, and then she did land them but still did not win the gold and that's why she became so disappointed and emotional about it. She also said she did not want to cry in public but she was not allowed any privacy although she asked for it - to be allowed to get out to locker rooms or for cameramen to turn away from her, and yes, her attempts to hide away could be seen by anyone who watched.
You can see this press conf here if you speak Russian (reporters had translation in their earphones so unfortunately you do not hear it and YT subtitling tool does not really work well on this from my very limited understanding of Russian) but I will not embed it as she started crying mid-sentence at the press conf when saying that and was still very distressed. Still, her words were then all over the world's press so you can find it quoted in all sorts of media outlets, in many languages I guess.
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Now, I do not recall her saying it was her coaches who told her she would win if she landed 5 quads but I am by no means an expert on Russian skaters and their interviews. What I recall is that the whole world saw Sasha literally screaming to Eteri during her outburst right between the Olympic FS and the flower ceremony "You knew it, you knew it all along, I hate you, I hate this sport". So people linked dots understanding that she had been convinced 5 quads=OGM by her coaches as a sort of motivational tool to keep her working towards this goal. Whether this is a right guess or not I have no idea, but she was quite young and she probably did get this idea from somewhere, was it her coaches, her family, watching how men's skating evolved, or just from counting points from the Scale of Values - I don't know.
Surely it had nothing to do with fans, and OP just takes it wrong.