It is based off of a book so I can't really blame them but the dialogue is by far the worst dialogue I have ever seen in any TV show. It is straight unbearable and Clarke chooses the most moral emotionally based actions as a leader but it works out because of her insanely thick plot armor. The average conversations are never casual or normal, its always leading into the plot. This may sound good but after you watch it you start to realize that its either comic relief or something to do with adding to the plot which usually results in it sounding disingenuous or awkward as there is rarely a casual conversation. Every character in this is completely lacking logic or braincells and it is just a pain to watch.
I was brought into watching this by the series of good reviews but after it turned out that the great female leaders that were promised ended up being whiny, pretentious, and invincible by all means, the show hurt to watch.
Do not watch after S4E13.