What’s the dark side of Silicon Valley?

I’ve been keeping an eye on this Quora question for a while now.  Indeed, we mostly hear about all the greatness of the Silicon Valley, but there are much be a few downsides to living and working there.  What are they?  There are many great answers in the thread.  Some are more insightful than others.  One particular bit that I liked is this one:

Sh!tty technology. This one might surprise people. Aren’t we in the center of technology? Well, here’s the truth. 95 percent of these so-called startups are marketing experiments that (a) don’t need great technology and (b) have to execute fast, which means they pile on the technical debt.