Man, if you have to try that hard to enjoy living in Japan, I seriously suggest considering a change of profession. This sounds just like your "glass of water" post, both of which I can not relate to at all.
If you can't have that type of fulfilling life because of your work, that is really really sad.
No, what is sad is how Japanese transmogrify behind the perceived anonymity afforded by a windshield. People who walking down the sidewalk would unconsciously shift to allow easy passage of others will go out of their way to cut people off or otherwise engage in overt acts of assholery when at the wheel.
What I didn't mention was how the problem was amplified at the time by the fact that I had been doing quite a bit of reading of Japanese books related to my interest, which is the criminal justice system. If a person wants to have their opinion of the Japanese as a people drawn to new lows, all that is necessary is to deeply inform one's self of the various vile and nasty acts they perpetrate on each other....something which normally doesn't enter the gaijin eye.
As I said, I recognized that the combination of my intense self-education via vernacular works and direct daily observations of people when on their absolute worst behavior was doing nothing but dragging my opinion of the place and people in a rapid downward spiral.
Hence, despite my interest in the topic, I entirely cut out reading books on the subject of Japanese crime. Further, I made a conscious decision not to expose myself to any news of such things. As for cutting down similar effects at work, I found that adding the idiocy of the Bob & Tom show podcast to my daily listening worked wonders. It's easier to laugh off what the idiots around me are up to when I'm already laughing at something else.
I recognized the problem and took actions to counter it. Years ago. I'm not bitter, and I do enjoy my work. At any rate, I find it beats the hell out of English teaching. At least it does for me. I did it, and was pretty good at it. But my personality wasn't really suited for it. I went from a job with at least a small matter of prestige to one with absolutely none, andI made twice as much money working about half the hours teaching English, but it wore on me far, far worse than anything I encounter in my current work. I won't say I'd never
go back to it, but I do fervently pray that I never have to.
Never underestimate my capacity for pettiness.