Her manager was a piece of shit who didn't know how to treat other people properly and who had zero respect for her and (reading between the lines) didn't have the slightest grasp of misogyny in the workplace (or actively perpetuated it) and had no idea how to manage anyone effectively.

They should've been fired the second or third time they utterly failed her. But when upper management are also douchebags they see nothing wrong and even encourage that bullshit.

Work for a decent place for a few years and you see the stark contrast very clearly...