BSG did war less convincingly than it did everything else. As has been said before, soldiers spend most of their down time talking a lot and cracking tasteless jokes (see Generation Kill). BSG completely failed to pick up on this.
Completely? You exaggerate.
In Season 1 with the reporter episode there was plenty of cracking tasteless jokes.
In Season 3 with the bar stuff there was also plenty of tasteless jokes.
You've either forgotten or need to rewatch the series.