Ok so my defense of the wight hunt.
Ill assume that it was a stupid plan. I dont necessarily agree, but for sake of the argument, ill relent.
Who came up with the plan? Tyrion. Now, Lotta people asking why Tyrion has nothing but shitty ideas this season. Daenerys answered it. Because he has an understandable soft spot for his family, even his birch sister.
Thats not unusual or implausible at all. Emotional attachment regularly makes us do stupid or irrational things.
So he has advised against burning down the keep because he doesn't want to see the ruin of his house, despite all the shit hes been through with them.
And, the way he saw it, they had three options to deal with the news of Brand Raven.
Leave, go North, and allow Cersei to reconsider everything.
Destroy Cersei (and likely Jaime) quickly and then go North.
Or the wight hunt.
Now option 2 seems like the most reasonable if you arent a Lannister. But he is. So all of these bad ideas he's coming up with need to be seen in that light. No matter how poorly he speaks of them, he ultimately doesn't want to see them die.
Tyrion is a decent suspect for the betrayal of love at this point. Love for his family.
No difference than Robb marrying a piece of ass. It was an emotional decision. Or, if you prefer the book version, it was decision made out of a sense of duty. Either way, it wasn't the most rational, smartest decision possible. But it was complete defensible as more than just bad writing. It was human.
So is Tyrions desire to protect his family to the best he can.
Now, as for the stupid decision not being punished. Again, for arguments sake, ill allow that all poor decisions should be met with consequences, even though I don't necessarily agree.
We'll discuss it next week. Not gonna spoil by arguing from a position of knowledge.
But lets revisit this again in a week.