The thing that rubs me so wrong about Mad Queen Dany is how awful the setup has been. This has been a book theory for a while, never one I subscribed to, but it had some support. But, what makes Dany's Mad Queen turn here so nonsensical is that nothing she has done suggests she is "losing it." Varys and Tyrion are somehow super concerned about the citizens of Kings Landing as if this is there first siege. And they beg Daenerys not to bring forth Fire & Blood. Yet, they can offer no alternatives on how to beat Cersei. They act like her burning the city is some instant-win, IT'S NOT. After Rhaegal's death they should understand now that even if Dany decides to burn Cersei out, she might still lose the battle. Euron's magical ballistas can take out Dany and her last dragon. And, the remainder of Dany's forces, including the Northmen, are a fraction of what they once were.
Daenerys throwing everything against Cersei is no guarantee of success. Yet, you have Varys and Tyrion hem hawing over a legitimate war tactic, their only tactic, if they hope to survive. And that somehow makes Dany a monstrous leader.
This is why D&D can't write politics, they don't understand shit. It's why they should'v stuck to NK End Boss.