More seriously, don't forget the "if you do bad things, you'll do well" rule that the show has apparently taken up. Even the books (and consequently, the earlier seasons of the show) were relatively clear that many of the powerful characters are successful because they're willing to do whatever it takes--not because they run a torture dungeon in Winterfell and do literally everything in their power to alienate the people they're ruling.

The Bolton storyline was just horrible. Everything from beginning to end, including that overwrought and interminable dumpster-fire of a battle that had everyone gushing, was boring. I quite liked the show up until season 4. At this point it's just a chore to watch.