Was the director present during the shooting of this film? If so, then wow... and when I say wow, I mean amazing levels of awful.
I read these books with my kids and the movie did not do the story justice. Now it's not like this series is epic by any standard... but with today's movie making technology and the field of actors available, this should be a slam dunk. But no....
The acting was neophyte as a whole... but I blame the director for this.. the dialog in the whole movie felt like a walk-thru. The only thing missing was the duct tape on the floor marking their positions.
One stand-out acting moment was a scene where the character Simon professed love for the lead character Clary. Before and After that... nothing worth mention.
Tongue-in-cheek moments are supposed to be intentional, if not subtle. But the laugh-out-loud moments were so numerous that I had to suppress myself out of courtesy to others who'd spent way too much money to see the film.
The Musical Score had a Cut & Paste feel to it. In most cases the emotion of the score did not line up with the emotion portrayed in the scene by the actor.
Bottom Line - I'm giving the actors a pass on this one... if they keep this director on the next installment, then shame on the studio.