You laugh, but I became a much less unhappy person when I consciously, and drastically, lowered my expectations for people in general. Of course that guy cut me off in traffic, he's a human, and humans are little better than hairless chimps. Of course that man is racist, he is trapped in a bubble of prejudice and propaganda that only logic and critical thinking could break him out of, and few people are so equipped.
It is as though I'm one of a small number of sapient beings, living among a population of animals that have yet to be Uplifted, and I set expectations accordingly.