Mostly true from my experience too. I have witnessed some incredible toxicity in some majority female organizations. Women can be very hard on their female subordinates. Particularly when there is a sense of ingratitude toward the difficult march to leadership the glass ceiling breakers had to go through.
Also, there is no more grindingly, soul-crushing bureaucratic and hide-bound organization than the Girl Scouts of America which lost focus on the "we need to prepare these young people for life" and instead adopted a "we need to have each Gold Project be a well-nigh unattainable new high watermark for humanity."
But, yeah... have enjoyed most of my female bosses.