The (public) engineering school I got my BS from had a ratio of roughly four males to every female when I started attending nearly 20 years ago. That ratio is below 2-to-1 now. There were ZERO female electrical engineering faculty when I was a freshman, now there are several. I don't know where the people doing these studies get their information, but my experience is that this gender issue has changed RADICALLY. Males are still nearly exclusively making the hiring decisions when it comes to new faculty, but that will come to an end soon because women are gaining influence in the department. I know my experience is merely anecdotal, but it is so completely the opposite of your narrative, I find it difficult to reconcile.
You're saying no progress is being made and I'm seeing a huge amount of progress being made at my alma mater. This doesn't add up.
P.S. Regarding my school, it is part of the state school system, so it's not like they were rejecting female applicants in favor of males. The entrance requirements were the same as all the other state schools, and the flagship state university has had more females than males since at least the 80s, if not the 70s. Females were choosing to not go to an engineering school for some reason. Perhaps they didn't want to go to a male dominated school with only 5000 students (90% of those engineers)? I have no idea.