It's a bro culture revolved around group think. In their minds you have to be an enthusiast of the game to get hired and thus a lot of departments are staffed with like minded sexist bros who think nothing of making rape jokes. If you call it out as a woman, you are a (insert explicative here) and guys who make efforts to stand up for them make them the target. Women learn to sit back and just not give their ideas. The only reason they are giving lip service to this is because they got busted, but the bad practices are only being turned down a notch rather than going away.
Otherwise it is a company without direction. Rather than focus on becoming a serious game publisher, they rather keep up with League even as it is diminishing with time (it's why other publishers have more than one game) and a lot of e-sports are past their peak. However, this would require a corporate mindset that is looking forward, something that doesn't tend to happen when you only hire within your own fanbase.
It's a company in search of renewed relevance now that there are multiple real competitors making a more interesting game experience for an audience who isn't angry boys exercising frustrations on everyone else.