Being forced to sit through this show was a very hard experience. Worst writing I've seen in a show that's somehow popular.
Character mood swings/development are largely inconsistent. They keep elongating the show by just making everyone make unrealistic terrible decisions constantly.
Example/Spoiler: Jasper gets a gun from Bellamy in Mount weather, after having shot and practiced firing for many episodes forgets how they work. He's infiltrated by 12 guards all wearing full body armor and 1 Scientist who's clearly the root of it all wearing no body armor and proceeds to shoot 1 guard 1 time in the body chest armor and then just stares that body armor works. He had a clear chance to shoot the scientist but doesn't. And how is he at all surprised being from space that body armor does its job. Maybe he's just suprised because in the same show body armor literally never works again.