QT films are pretty damned entertaining. I think people sometimes try to make more of them than they should, and this inevitably leads to a letdown. QT is all about providing an honest, no-bullshit, self-indulgent, fun time. You have to go into a Tarantino movie not just expecting shtick, and campy dialogue, and kitschy plotting, but reveling in it. Especially with the more recent films from, say, Kill Bill onward.
It's smart lowbrow, and people run afoul of it when they expect highbrow.