QT8: The First Eight is a misleading title for this documentary, which feels more like an admiring portrait of Quentin Tarantino than anything else. Aside from the awkwardness of having two "eights" in the name—even if it's meant as a nod to the Crazy 88, it’s still not great—a better description would be The First Three That Truly Matter and the Six (including Once Upon a Time in Hollywood) Overlong, Self-Indulgent,…