Her complaint here, one of many many complaints of sexism, seems to be that her manager is unhappy that she loads him down with complaints and too much detail that he doesn't want to know.
She puts this down to sexism. It's not clear why this is sexist. She is wasting his time. If he is like most managers he is very pressed for time and he doesn't need his time wasted.
In this case, sexism is a redundant explanation because other, better, simpler explanations are available. in Bayesian theory this is technically called "explaining away" and it is a good thing. Fact A is not evidence for claim B if explanation C is better.