Think what you may, but from my seat; Tarantino IS a hack.
He substitutes any kind of meaningful directing with overly-flashy, confusing, almost masturbatorily-unnecessary use of violence. He throws over a catchy tune, and boom *VISIONARY*... Then his stories, which exist in non-contiguous bursts between meaningless violence scenes, will run you in circles and lead you nowhere fast. After two hours of a Tarantino movie you're about 8 dollar shy of when you went in, you may have a bad taste in your mouth (I always have), you'll realize the movie made no progress, and you've lost two hours of your life.
He's done NOTHING that ever impressed me. Just my two cents. When it comes to directing, there are only two big names left: Spielburg and Shyamalan.