I only worked for men, but the secretaries would be women often older than me. They would snipe at me or complain if I changed things - it was in the days before word processors, so if I changed something, that made her work look bad! This did not always happen, as I did have some helpful and supportive secretaries. When I got to a point where one was assigned to me, they were starting to be younger than me, and that made a difference. I think the older ones resented a younger woman professional and their generation was one that initially stayed home as housewives and if they worked, would always be the secretary rather than the executive.

By now, that generation is retired or gone, so it is probably less of a thing.