You know, looking at your previous post, I actually agree with what you say about the beginning. It is WAY too rushed at the start. I also think it settles into a very natural and consistently entertaining pace later, though. And if you think it's dumb that still doesn't change the fact that it was better made than many of the other Star Trek movies. Calling it the worst is just being petty, dismissing all the superficial qualities like SFX, production design, and music that place it clearly above some of the others.
"The fact it was better made"... Is it a fact? It's solid in the way it's made, but so is every other ST film. In fact, in my personal opinion, it's less solidly made because
1. as pointed out, the beginning especially is rushed, doesn't establish the Borg firmly enough as the formidable foe they are supposed to be. It lacks scope. For comparison, the new film shows how you can do an opening that's both fast and grand and a space battle that has human content. FC does not. It's garbled audio, then it's a series of FX shots and a deleted scene from Deep Space Nine and then the battle is over. No casualties, no damage, no emotion. It falls flat. I blame the writers.
2. awkward subplots. Three plot threads go through the film that never really intersect and vary wildly in tone. There is no dramatic urgency when fighting the Borg on the Enterprise is constantly interrupted by the lighthearted time-travel hijinx on Earth (or Dixon Hill holodeck time, for that matter, or Fun with the EMH Program). Again, I blame the writers.
3. the pacing is leaden. As far as I'm concerned, Jonathan Frakes did a much better job directing action in INS than he did here.
4. the plot holes, concerning time-travel and the Borg, are no better here than they are in NEM - a film widely trashed for precisely that: Action!Picard, the villain's forced personal fixation on a crewmember (Shinzon - Picard, Borg Queen - Data) that's eventually their undoing, lack of logic on part of said villain regarding their Diabolical Plan of Doom, etc....
5. I personally don't like the music. The main theme is too soft, too "Barbra Streisand in a geriatric romantic comedy"
Again, people's opinions differ on these films. There are, after all, those folks, who think TWOK is the worst ST film... Yes!