My gut feeling is that her own fault there lay in mainly failing to live up to some unreasonably high and arbitrary standard.
You may be right, judging by the original flashback, but on the other hand, her attitude, not just the "a pain" comment, but also the look on her face there, seems to point at her not taking this too seriously either, so the standards she failed to live up to may not have been as unreasonable as she has convinced herself they were. (The "you will quit right away" comment in her memories does stink of additional misogyny at at least one place she tried, though.) In the end, there's no way to tell for sure until we see the next chapter.