So you don't like "music video editing" or musicals is what you're saying.
That is fine, but if you don't eat meat you can't be expected to judge the flavor of a steak fairly. Nor should I take your opinion on the topic as having any value.
For my part, it is absolutely one of my favorite films. I can appreciate that it isn't everyone's cup of tea, but I personally have a weakness for slick editing, art direction and "right in the feels" writing though.