Well there was Shaw who was a complete, disrespectful a-hole, Seven who was clearly bitter and unhappy about her treatment on the ship, Riker who was still bitter about the death of his child and on the outs with Troi, Raffi who was angry and pissed off about her current assignment, and Beverly who has become much more hard-edged and is apparently angry with Picard and stopped talking to everyone for 20 years.I’m curious what bitter and angry characters you are talking about? Other then the Captain Shaw, who really isn’t any different then a Jellico, or Tracey what characters did you find angry and bitter?
I mean hell, I don't even think the crew on DS9 were this disfunctional.