I was just reading the "State of American Ladies" thread and many people were talking about the disappointing results of Mirai, who four years ago would have seemed to be a contender for gold this year. That got me to thinking that she is not the only one who has hit hard times in the last few years.
Besides Mirai, I can think of
1. Kimmie--though at least she was the World Champion, she certainly never did a thing after that, and it was her downfall that led to journeywoman skaters like Rachael and Alyssa being the best the US had.
2. Caroline. What else can I say?
3. Naomi Nari Nam. At least she came back as a pairs skater a few years later.
4. The ice dancers that were "better" than Naomi Lang and partner, except they actually weren't. Silverstein and Pekarek were their names, IIRC. I think she went to the Olympics with a different partner, but wasn't in contention.
Anybody else? I'm sure there are plenty!