Lots of threads left dangling in the finale

I thought surely this drama had jumped the shark with the dramatic cliffhanger at the end of episode 10, but the plot wriggled out it off satisfactorily. However I'm still struggling to figure out what happened in this final episode after the cliffhanger at the end of episode 11. The storyline in episode 12 is really hard to follow, the characters shoot off in nonsensical directions, and plot threads are left dangling. This drama was nearly a 10 in my book, but the ending was a disappointment.