I started as an engineer in the spring of 2014 and this was definitely the case there.
Top engineers were being poached from Google/FB and these people were trying to carve out territory in a quickly growing engineering team.
The misogynistic culture, in my mind, comes from most of the early employees being former frat bros. Culture was extremely heavy on the drinking; see "Work-cations" where most of the team would go to an exotic location which was half-hackathon/half boozefest. There were happy hours every week with open bar because all new employees would be flown to SF (no matter where home office was) for orientation.
Crazy, most ex-employees (even the early ones) acknowledge that the culture is bad but they got their $$$ so they won't have to work again for a long time, if ever.