Yes, there's a staggering number of people in the Bay Area who think they're gods gift yet have essentially average intelligence, they confuse understanding code with understanding the world.
At the same time there are many humble people, ambitious yet realistic people and extremely skilled people in the Valley. It's the centre of the tech world for a good reason.
For some years I worked for Google out of Switzerland. For me and many other people this was the perfect balance. Working for Americans, especially the sort that make companies in SV, was an inspiring experience. The can-do, "what hard thing shall we tackle next" attitude is one that's frankly difficult to find elsewhere. They'd just throw themselves into a challenge without even stopping to think about what could go wrong; the sunshine of the state was like the sunshine in their minds. Not surprisingly there are a lot of failed and zombie startups in the Valley as a result, but that's still better than in most places where there just aren't any at all.
On the other hand, I was quite satisfied with the much higher quality of life in the Swiss office. You could walk out of the door at the end of the day and stroll in a few minutes to a beautiful lake with an actual mountain view, go for a swim, barbecue with friends in a well maintained public park, dry off, utilise the spotlessly clean and free public toilets, and within a few minutes walk be in the city centre in bars and restaurants. Crime was virtually non-existent thanks to the fast response times of the police, who were nonetheless invariably friendly and hands off, so people would routinely just leave all their stuff on the shore when going for a swim without worrying about it. I once forgot my coat in a bar and then failed to pick it up for a week, when I went back it was still there, hanging right where I left it.
I wouldn't want to live in the Valley but I'm always happy to work with people who do.