I loved how these brilliant astronauts can't see how loving deceased people could possibly have social utility or could otherwise be explained without resorting to "love is supernatural magic." That is a particularly strong example of how bad the screenwriting is in this film.
The bad parts of the movie were mainly editing, non rational emotionalism (main characters making obviously bad choices for shallow emotional reasons), and a giant paradox.
With editing, the drone scene was interesting but did nothing to advance the story. School scene was ok but too long.
The entire "power of love" scene was just dumb. People in that situation would not act like that.
The biggest problem was the paradox. Earth is becoming uninhabitable. Future humans must influence the past to save humanity. But there are no future humans in the first place since the Earth is dying. This is the biggest plot hole in the movie and it's the size of a black hole. Even slightly changing the story so that humans do survive, then are reaching back to make the survival process easier would be fine. Kind of a Redemption of Christopher Columbus type of story.