There are a lot of loopholes in this series. You would believe an advance society would just send kids back to earth without any supplier to survive especially after radiation?
Being able to lid candle in an old bunker. (I don't the oxygen compressor works)
There are multiple convenient pieces of writing which don't make the character believable. Imagine your best friend was murder, and the next day you are okay. Only to find the killer dying and feeling the atonement of grief.
This show lacks human understanding of emotions, making some scene feel fake or robotic. You don't beleive its real therefore you arent as invested in it.
On the other hand, the show's premise is definitely interesting. It's a great concept and intrigue.