That's just an unbacked assertion; come back with something better.

"nag" and get called a "bitch"!

If you are a nag you probably deserve to get called a bitch. I'm fairly certain if I nag like the OP, I'll get called a bitch, and I'm not a girl. If that's sexism, I supposed it's misandry if I get called a dick. Lame.

What happens when many females encounter similar attitudes in many CS work spaces

What happens is that it will be demonstrable with a valid statistical test, instead of being stretched from one anecdote to a complaint about CS DepartmentS in general, which the idiotic OP did. I'm waiting for you to produce the stats.

<crickets/>