The Final Descent

I've been trying to read this for weeks and I can't do it. The series is fantastic, I recommend it, but this last one is just a disjointed mess of scenes where characters act unrecognisable.
I'm not torturing myself any longer when this series would have deserved a much better conclusion, that makes sense and doesn't just pull apart everything that got built so far. I'm really not going to put more effort into this. Sorry.