Just to be clear, women being constantly being belittled and treated as secretaries is discrimination based on sex, and it is extremely likely that they being sexually harassed in ways that you don't see. There are tons of ways for bosses and coworkers to pull people aside, force people to stay late, or even pressure meetups outside of the workplace framed as business/mentoring lunches, to set up situations where they can say and do things that no one else will see or hear. Belittling people is often a practice that abusers use to wear down victims psychologically, to set the stage for ongoing and escalating abuse. Many abusers are very socially clever these days, and will go to great lengths to groom their victims into not realizing they are being abused, target people who need the job/reference/experience etc. and keep as much of the abuse as possible outside of official records like email, and even manufacture documentation in retaliation of the people they abuse, for example, creating false poor performance reviews, so they can dispose of victims when they are done and have a evidence in their own favor if there is a court case.