I think whatever problems Nemesis has bothers the fans more than the general audience, I really don't think the general movie going audience cared that much if the movie violated the series continuity.
Is that why it had such big box office appeal? I agree that the nitpicky Trek fan crap or continuity stuff doesn't bother a general audience, but the fact that it's an incoherent film with questionable production quality probably does bother that general audience.