The only people I know who have complained to me about Wikipedia are all contrarians (some of which I would call "Contrarian idiots", since the play on the green day song just popped into my head) who have so far been basically unable to substantiate any concrete argument, either structural or regarding more than the minutiae of a given article.
It's also worth noting that in recent years we've had a lot of very controversial and more importantly novel geopolitical and domestic "lore" being formed, and I think people make a fundamental mistake in expecting wikipedia to be as confident as it is for the new as it is for the old or perhaps merely mature.