Mayor of Carrot City
This type of thing often happens to child stars. Somebody thinks their decision making power over the child caused the child's success and so they try pulling strings, which destabilizes a winning formula . . . then has too much pride to put it back together.
Or just grabs for the nearest shiny thing that looks like it might be feasible. Or doesn’t know as much as they might think they do, and makes a decision based on flawed information.
And there's also the reality that every skater maxes out sooner or later, as in reaching the limit of their physical/mental ability. That's not a diss on skaters who try hard or work hard, or both, it's just a reality. And no coach can "fix" that. Coaches can only work with what the skater has.