I still like Jurassic Park more than you do but when I rewatched it a year or two ago I thought alot of it was pretty goofy. The T-Rex attack is gripping until the scene where they hold still, making themselves invisible to it, and then it sneezes on them and turns away. After that the rest of the sequence feels like a romp. I'm sure that was intentional but it doesn't play as well as it did when I was 11.
I think the most mindbogglingly dumb plot point would have to be allowing all the security/game warden people but one to go home because the hurricane is coming.