Not bitter, only slightly paranoid. Probably a windbag.
But the last is probably due largely to the antibiotic I'm taking. I'm seriously glad I work at home.
Bitterness results when you have given up on things. I haven't. If I'm paranoid, it expresses itself in a tendency to assume the worst motivations on the part of politicians and others who hold my life in their hands. Maybe cynicism would be a better term.