They could have survived if they accepted Beth was gonna die, being stuck in the middle of the hell hole of the alien invasion, and ran to safety. As they all died going to try to rescue her.
Cool visuals, humor and acting, get you hooked, but that's about it. You can't see 20% of the film due to camera shaking. 30% is them running around, and the rest is seeing what the thing is.
If Rob didn't fight with Beth in the beginning, she wouldn't have gone back to her apartment, and they would've survived the entire thing. But they all died because of his immature emotional breakdown the whole film.