I used to have this perspective, but then I read a quote or excerpt in which PKD says he was surprised that people find his work hopeless or depressing, because

I used to have this perspective, but then I read a quote or excerpt in which PKD says he was surprised that people find his work hopeless or depressing, because he intends his work to be hopeful. I reflected on this and realised that he's right. In his stories the hero often courageously penetrates through the facade and gets to the truth of things. What's more, there is generally an objective truth underneath the facade. It's not turtles all the way down. There is a reasonable explanation and once the hero figures it out they manage to take some control of their own destiny.