Bay Area politics are much more nuanced than that.
For example, there's always been a strong Libertarian community in the larger Tech community. And over the last couple years a lot of online Libertarian communities have shifted to more right (and far-right) ideology.
There's also a strong Leftist community in the Bay Area, arguably much stronger than the rest of the country. This shouldn't be forgotten. You're way more likely to meet a Communist at a bar in SF than most parts of this country.
There's a strong "liberal" community in the Bay Area, these people will support liberal social issues (Gay/Trans inclusion, virulently anti-Trump, supporting of Muslims and other oppressed communities, reigning in the banks, etc.). But, a lot of these people also suffer from the Not-In-My-Backyard syndrome and will balk at modest reforms to Schooling or Housing Policy.
There's also Reagan Republicans, Antifacists, Anarchists, and people who aren't checked into Politics at all.
I'm not saying everyone in the Bay Area fits into one of these groups or even that my characterizations of these groups are accurate. These groups aren't monoliths.
I would just encourage you to not let your heart get broken, things can get better. The Bay Area is still very Progressive. Volunteer for a Progressive Campaign, DSA, or some other progressive organization and I think you'll get your hope back!