Why it was the worst: I have none of the obvious attributes you read about in psych texts and self-help. I'm not a pessimist, I don't dwell on the past, I don't get angry, etc. This issue was very difficult to see clearly.

First, I realised being too future-oriented was problematic. While I didn't dwell on the past, I was discounting my present situation far too much, perhaps pathologically.

I could have sworn "Dwell in the present (including not the future)" is a prominent notion in self help literature.

Outcome: I no longer hate people.

Fantastic. That'll make life much more pleasant for you!