I have also never read the books but that last season throws every character development out the window in a show all about characters and just rushes through scenes ignoring any build up to conclude to whatever shit the writers thought no one would ever guess because it was more important for them to not be guessed than to make it make sense.
It is objectively a horrible season, doubly so in contrast to the first one.
Feels like we've been waiting for this bubble to burst for a lifetime.