The physics! The physics are EATING MY BRAIN. Did not a single person involved in the writing of that movie know what a supernova, a black hole, an interplanetary distance, or a vacuum was?
(No, wait, they had no sound in space, twice. So they knew what a vacuum was SOME of the time. That makes it worse!)
It was a fun enough movie as long as you could turn off the educated part of your brain, completely. Seriously, so much of that film was just like
Michael Bay's Batman script for sheer nonsense value. And once you accept that none of the things they're discussing are anything like the things they're discussing, there are a couple of clunky incidents of Explaining The Carburator for the slower children in the audience.
But, hey, fun story, very good special effects, the stupidity is limited to a complete inability to understand basic astrophysics and a little suspension of disbelief about the chain of command, and once you get past that it's not like there's an Idiot Plot running things. So, it's basically the best Star Trek movie currently possible.