There are so, so many reasons this movie was a failure that to enumerate them would be an exercise in exhaustion. I think the most annoying part was also the most ridiculous: everyone talked in different accents, and sang in others. For example, Romeo and Juliet both use something like RP or a southern English accent, but Romeo's father uses a distinct Northern English brogue. Juliet's parents sound the same as her, for whatever reason. Other characters' accents are undeniably American, though we are supposed to believe they're all (or mostly) native residents of the same city. To confuse matters further, everyone sings in an American accent!
As for the rest, the music was poorly written and just as poorly produced, the script (all modern English) was practically phoned in, and the cinematography was amateurish. The worst offense, however, was a complete disregard for key character moments and interactions that lovers of Shakespeare cherish from the original play. Phrases and lines from the source text are haphazardly re-contextualized-and delivered so carelessly-that they lose their original power, poetry, and philosophical punch. After close to an hour of watching this joke of a production, I decided to revoke the rest of the time I had originally entrusted to the film (during the apothecary's song, if that matters). Maybe that undercuts the validity of my review, but I don't care. Enduring the rest of that awful movie isn't worth bolstering the arguments of an online review that hardly anyone will read.
In fairness, I liked the imagery of the musical scene where the main characters have parted ways from the church but are still together "in their hearts," or whatever, but ONLY on an aesthetic level, because everything else about that scene is creatively tragic.
