If I was GRRM.... I'd have Dany admit to someone that she never cared about the Dothraki, they are savages that trade slaves. She never cared about the slaves she freed, if she had, she would have stayed in the East to ensure it didn't return. What she cared about was ruling Westeros..... All the easterners she brought with her were a means to the end, ruling Westeros. Then we watch her callously use them over a few months, while occasionally killing Westerosi when they don't love her. It isn't a psychological break, it's a long play.....