> Positive feelings about the justice system don't seem to survive jury duty

That's one anecdote, but I've often heard the opposite: even in charged cases where jurors were obviously interpreting the evidence differently, people took the job seriously and were respectful to one another. Not saying normal cognitive biases don't occur, but even though my only experience was with jury selection (and I wasn't selected), and even though we didn't really want to be there, from the conversations I felt that everyone took the duty seriously.