When you put it like that, it makes the whole thing so much worse. It's not just that future Loki is evil. No, it's that the guy is so clearly broken that he calls his younger self a girl and an idiot, that he would be willing to do this in the first place.
The thing is, the things you read that try to make Loki seem like not so horrible of a guy...well, I used to hate them, but this issue...I mean, really. She's his mother! Even if she's his adoptive mother, she's still his mother. And she's willing to throw him to the wolves and under the bus. What else is she going to do to him? Really, what? It makes you wonder.