It's not just this text (which for a russian reader makes very troubling impression). There are many reports of further inadequate behaviour of Alexandra. This might be a result of online pressure, but in any case situation around Sci-Hub does not make a healthy impression at all.

Yeah there are many reports like this, but I think Alexandra behaves quite ok in the given circumstances. Actually these reports of her "inadequate" behavior (mostly by people who intentionally blackmail her and behave no better themselves) is what she protests against as she suspects that it is an organized attempt to harm her reputation and project, and it is very likely that it really is. Her communication style is often harsh, and some of her views are quite unusual, but this is not a crime and definitely not enough to label someone insane or treat like she is treated.