> How do my examples not back up this point?
You give an example of one guy with a posted, and one manager, and then conclude "culture" in general, and that they can "never truly fit in with the guys"; But why is this the case with the anime poster guy? How does the managers treatment of the employee relate to their relationship with the other guys on the team?
> the behaviors we normalize
This is along the lines of the "role model" argument; all must conform to prescribed behavior lest a slippery-slope epidemic of deviance should arise. Do all the cubicles have scantily clad women?
> Videogames, Reddit, and HackerNews all have examples of this
The first two are verymuchnot the workplace. Reddit has many different cultures, depending on which subreddit you are in.
You list HN too (which is maybe a little closer to the workplace), as in "Women are overly criticized on HN when they're doing anything that's a male-dominant activity" - I'm not sure I agree, can you give an example?