This movie was bad, plain and simple.
Jason returns, again, to terrorize the campgrounds, again, and kill skinnydipping teenagers, again. One could, of course, argue that the Friday the 13th series was cliche because it invented the cliche, and that's what makes it so great. I might buy that if this was the second or possibly third installment of the series, but, and I think this applies to every movie franchise that isn't based on one overall story (i.e. Star Wars, Lord of the Rings, Back to the Future, etc.), Once you get beyond Part III, you really need to stop, ok? I mean, seriously. Look at every Part III+ out there. Jaws 3 sucked. Halloween 3 had nothing to do with the previous two or subsequent 80. Ninja Turtles 3 was awful, painful, even. Jurassic Park III was a travesty. Hell, even The Godfather Part 3 is considered the worst of the series. When you get to part 7 of anything, it's a sign that you should have stopped.
Anyway, this movie is essentially Jason vs. Carrie, only without the rights to Carrie. A telekinetic girl inadvertantly has Jason kill her father and then accidentally reanimates him (Jason, not the father), and he goes on a killing spree, and blah blah blah.
In the end, Carrie (not her real name) makes a roof collapse on him, and then electrocutes him. Again, I'd like to remind you that this is Part 7. At this point, everyone who's ever visited the campground knows that Jason cannot be killed. He will always come back. It's happened like this every time. Granted, he wasn't a murderous fiend in the first one (it was his mom), but in each subsequent movie, he's taken care of and comes back to kill again. The goal in the movie is to find a way to prevent him from coming back. No, if the guy can withstand being burnt alive, drowned, maimed, tied to a bigass rock, set afire, and dropped to the bottom of the lake, and so on, I'm pretty sure a collapsed roof coupled with an electrocution isn't going to do the job. We know this for two reasons: 1. Jason has had worse happen to him and come away smiling, and 2. He Takes Manhattan in Part 8.
Ugh.