1) It's 2013. If you work with men that don't know women are people, find a new job. If they did something excessively stupid or harmful, you should sue them to discourage them from harassing other women. Interviewing is a two way street, you should not only prove that you're able to do a job, but also find out if you want to work with these people.
2) Why learn from asshole managers? The internet exists. Learning a new framework is easier than ever with superb documentation and tutorials. For the fundamentals, some CS courses are fully available online. You can even go back to school.
3) Yes, it is a numbers game. There are a small number of women who major in CS/EE, and from that pool of people there are an even smaller percentage who stick with it and get jobs in tech. Now as to _why_ fewer women are majoring in CS than in the past is something we should be investigating.
4) Seeing that it's mostly men who have jobs in tech, it makes sense that you'll see a small representation of women in VC backed companies.
5) If VC's are unconsciously discriminating against people who don't look like Mark Zuckerberg, what's stopping you from bootstrapping? The costs of starting a software company are smaller than ever.