No. 20th/21st century viewers just deal better with imperfections because we are imperfect.
STNG characters are imperfect, but less so than us..I think the greatest difference is that we don't see them bow to some of our baser impulses. However, though argument is not not necessarily and indicator of quality, there were quite a few confrontations in STNG you've probably forgotten. Most had to do with what was proper in relation to Starfleet conduct, ie: the Doctor going out on a limb for a Ferengi scientist, Picard admonishing Worf for any series of incidents, including his duty to Starfleet whne faced with cultural quandries, and Picard with Riker in Pegasus. Riker also disagreed with Picard on more than a few occasions.
As I've pointed out, while the ST shows are generally positive, STNG argued completely from positiivity in a pseudo-utopia to make it's points, as opposed to the negative, often dystopic futures we see. I find it unique and refreshing.