Isn't it funny how people go to movie theaters and have completely different experiences? This is why it's really hard to definitively label any movie as "good" or "bad"- as Albert Einstein said, it's all relative!
Some people like the movie and some people LOVE the movie. Some people dislike the movie and some people HATE the movie.
And then you have some that are a mixture- I liked parts, but disliked other parts. I loved parts, but hated other parts. And so forth.
For the record, I personally LOVE "Indiana Jones and the Kingdom of the Crystal Skull"- just as I LOVE "Raiders of the Lost Ark", "Indiana Jones and the Temple of Doom" and "Indiana Jones and the Last Crusade". They have ALL been great movies! (in my opinion, of course.)
And yes- I can't wait to LOVE the 5th. Indy movie too.