I have been curious whether differences in brain volume and hormones affect one's way of thinking? Or is it more complicated?

The second thing I want to discuss is, well:

I'm a man experiencing the "stereotype threat" effect. I seriously think that because of my gender (or at the very least, difference in brain structure), I'm less astute, intelligent and intuitive than my female peers. The women don't even imply such a thing but it's something I feel like. It doesn't help when male privilege comes up because it often has the unintended implications that men's success and achievements are handed to them and the obstacles they do face is nothing compared to what women go through.

I tried to find studies which confirm against this notion, as well as talked to people about this (especially if medical background), but deep down, I feel and know it's not sufficent to convince me otherwise.