It seems pretty extreme to say that her livelihood was in jeopardy given that her salary was probably an order of magnitude more than an average worker. She likely put up with that and other toxic behavior because she was highly ambitious and wanted to keep making immense amounts of money.

This doesn't excuse Sandberg at all, I'm sure she would be a horrifically bad person to work for. But when I read that section I immediately thought of highly ambitious people I've worked with who I could see on either side of that encounter. Such people often are highly materially successful, although most of them don't seem very happy about it.