Season 2 is very underrated, it is the season when the show gets good and it's better than season 3, but so many people just lump it with season 1 as "bad early seasons" because it was before the Dominion (although it actually introduced the Dominion). It has some really great episodes, but the show doesn't get consistently good before season 4, both seasons 2 and 3 have great episodes regularly interspersed with clunkers.
Your ratings are really harsh. I think Necessary Evil deserves a 5. It is one of the best episodes of the show IMO. I'm a sucker for occupation stories, and this one was really well-done and might be the first successful (and non-parodic) Trek noir
episode. (Terok Nor = Trek Noir, clever!).
This reminds me this forum's great pitch
from a few years ago (damn, time flies fast!) for an HBO or Showtime series "Terok Nor".