Every HP movie has sucked. The first two were less sucky for the good Dumbledore + Alan Rickman Snape.

Everything after that...not even Mr. Rickman can support the untalented cast he's forced to work with in the next foru films.

Though, to be fair, it's more the fault of whoever writes the script. Their methodology seems to be shouting the story at you rather than telling it. The pacing is just awful and it's quite clear they are just flipping through the book and saying "let's put that in there...let's not put that in there...let's put that in there but change it..."

That's just my opinion though.

And the language of the Series books is definitely not third grade. I doubt even your average middle schooler would understand half the references. I know I didn't. Though i'll be fair and say I was a below average middle schooler.