This is not a sci-fi series, lets start with that assumption, only then it would make some sense. They got good actors, bad direction, they keep dragging small boring parts of series with more useless flashbacks. There isn't good enough motivation for characters to go so bonkers. That part never made sense.
Acting is good, so sort of would work good as a dumb fantasy series.
Acting is good, so sort of would work good as a dumb fantasy series.