Well speaking as someone who only read the first three...
My DH and I went and saw this last night too. I walked out of the theater feeling the EXACT same way I did when I walked out, after seeing Two Towers....I don't want this to end!! I am in such love with the movies that I am glad (gasp) that I stopped reading the books.
Obviously not every character or situation is going to be able to fit into an appropriate time frame (especially for those younger children in the audience...-even though it IS PG-13!), but I think this is really my favorite movie (HP) by far.
It is understood that die-hard HP fans who love the books are honestly, bound to be disappointed continuously down the road. You (HP Book fans) have been reading and have a deep emotional connection to the different characters. As we go along, HP is going to be faced with many dark things (which makes your love for him grow deeper since it is more adult based...know what I mean?) and the books just seem to be getting longer and longer. A lot really is going to have to be cut which only sets you up to be upset at what was not included in the movie, instead of what the movie DID have.
I really am sorry you did not enjoy it. I for one, am excited by how the characters are really growing up. This was one of the many conversations DH and I had afterwards. It WILL be interesting how they will keep the movies PG-13 and under (if it ever goes back to G...highly unlikely IMHO) in the future. Also, how are they going to keep it kid-friendly?! There were quite a few scenes I was a little taken by last night (can we say...bubbles?!

), but since I am way over 13, I have no problems with it. Just curious how those out there with under 13s felt about those scenes. And seriously, we all know the road that will probably have to be taken during the last movie (well...DH doesn't think so, but we have a $10 bet on it

) so how are children going to react to this?
But I digress...this has been quite a long post and I need to grab breakfast before work. MiakodaWDW, I hope you have not given up yet on the HP movies...and for the rest, I really hope you do sit back and enjoy this very entertaining story!