I think you should read more historical accounts, and less theoretical deconstructionist “women’s studies” screeds.
The great majority of human history has no written historical accounts and very few physical remains. How many events in 50-200,000 years of human history have been accurately reported, recorded and can be accepted as unbiased fact today? Maybe 0.01% (one 10,000th) so of course most information about that time period is theoretical.
However, when looking at our overall physiology, sex differences, psychology and instincts it becomes obvious how brutal most of our history was. Early history is ingrained in who we are and our minds/bodies ARE the historical account. Civilization is a thin and very recent veneer that frequently shows cracks, even in our otherwise highly modern world.
BTW, I'm not a woman and have no connection at all to “women's studies”. I simply have have a deep interest in understanding our early history and have traveled a great deal all around the world to better do so.