All you need to know is here, in these few dialogues that are exchanged between Tyrion and Dany in that very same episode -

DAENERYS: In Meereen, the slaves turned on the masters and liberated the city themselves the moment I arrived. 
 
TYRION: The people of King's Landing are afraid. 
Anyone who resists Cersei will see his family butchered. 
You can't expect them to be heroes. They're hostages. 
They are in a tyrant's grip. 
 
 
DAENERYS: Whose fault is that? Mine? 

Dany thinks that she is the best queen there ever was or will be and anyone who fails to see that is a moron who deserves to die.

The Unsullied chose to follow her. Good.

The Dothraki bowed down to her fireproofness. Good.

Meereen rebelled. Burn.

Jon Snow bent the knee. Good.

Randyll Tarly didn’t. Burn.

King’s Landing didn’t open the gates to greet her as a Goddess. Burn.

It’s all right there. You just need to see it.