With her dissertation, why is she trying to find the structure of it now to see if it makes sense?
Simple answer: She's an indescribable moron and she's screwed herself royally by never learning to write an essay by herself or think critically and independently.
She devised a dodgy essay-writing system based on skipping reading the main text and reverse-engineering an essay stitched together from a wealth of stolen and heavily-rewritten ideas cribbed from critical essays, Blakeney, seminar groups and lecturers.
But like most things she's taken endless shortcuts with and never improved at, she's robbed herself of the learning experience and never grew to think independently or critically. Her dodgy essay factory setup might work for an essay where she's given a clear, pre-defined question and where everyone around her is studying the same texts. But, predictably, she has no clue what to do when given a blank slate and nobody to steal from, and can't even form a basic, clear critical argument to start from.
She's her own worst enemy, and I think with her dissertation, all her worst instincts are colliding in a perfect storm of stupidity.
She was instantly out of her depth, but her delusions of grandeur and innate stupidity had her aiming to write a PhD-level essay at undergrad level rather than focusing on a safe, sensible, realistic goal suited to her limited ability.
She put aesthetics first, chasing Dark Academia fantasies of trawling dusty archives, finding undiscovered manuscripts and becoming an academic sensation, resulting in over a year of wasted time and pointless research.
She craves the praise of teachers and lecturers, but refuses to listen to instruction. She thinks she's always right and believes she can impress by ignoring academic guidance, colour outside the lines and push the boundaries of what work is expected. This has screwed her over before, and it's probably why she's being asked to do massive revisions after every supervisor meeting and there's still no improvement.
She tried applying her usual shortcuts to her dissertation, shoehorning in things she already had (questionable) knowledge and (superficial) interest in to save time, so shoehorned Victorian nonsense, letter-writing etiquette, gift culture and a whole cavalcade of bafflingly unrelated crap in. Without a clear argument or structure, that's all just incoherent, disconnected drivel that she's now struggling to make sense of.
She never came up with a clear essay topic, and put so much time into cramming in meandering, irrelevant nonsense that her dissertation contains practically nothing else, and there's no way to fix that without starting from scratch. At this point, she's way too late to salvage it. She's rearranging deckchairs on the Titanic.