Not really underlying.
These are classic ED behaviors. With how popular GLP-1s are these days, we are already seeing a resurgence in the proana stuff of the early 2000s.
Something’s definitely happened in her past that's unresolved or been going on and it led her to this. Her tiktok reposts are really telling of her mental state.
New content on the main thread made me check in for the first time in a while and holy shit the difference is so stark. Like... it's fucking depressing, man, comparing page 1 to the new stuff. Girl needs help, genuinely.