Short version: it’s Lord of the Flies in space but without any of the weight of the original allegory.
Longer version: The world is dying so a group of scientists send a bunch of teenagers into space without much personal or automated supervision for 86 years. What could go wrong?
Honestly, the premise of a generation ship could have worked had they not already admitted they had both invitro fertilization and extra-utero gestation solved. Why the heck did they need more than a few adults to get the ship where it needed to be? Bring a seed bank of humans; the rest could have been made later either in waves or all at once near the end so they were useful. Would have saved a ton of supplies and space.
But that wasn’t the story Neil Burger (The Upside) wanted to tell. He wanted to show the horror of mankind unbound. Except he didn’t. He showed what a couple of psychopathic teens could accomplish when adults were too stupid to take precautions like monitoring their charges physically, chemically, or some other way. The pitfalls of the plan are obvious to anyone and the results inevitable. So the movie is really about the spectacle.
Unfortunately, while there are some nice design an visual effects, there isn’t a lot of good spectacle on display either. Not in terms of fights, skin, or anything else that might qualify. Burger couldn’t really commit to his vision, or the studio kept scaling it back. Frankly High Life or even the nearly unwatchable Climax took on these themes better. And Passengers, for any flaws it may have or others thought of it, looked at long space flight better as well.
What is a shame is that he had some talent there waiting to tackle the problems. Tye Sheridan (X-Men: Dark Phoenix), Fionn Whitehead (Black Mirror: Bandersnatch), Lily-Rose Depp, not to mention Colin Farrell (Ava) all have chops. But Burger’s script and direction did them no favors. While they all start at a good place and are good at the understated base from which it all launches, none of them really have an arc we care about emotionally.
So, yes, skip this. My pain should not be yours. Burger is a capable filmmaker, but this was not one he will be remembered for. And none of the actors will admit to this down the road unless under duress.