Well, if you're going into this with the idea that Bran is the worst husband ever, and Mercy is a spoiled brat, and therefore Leah is the victim, then of course you're going to side with her. And that's fine, go for it. But I can't really help but be mildly frustrated that you're just making these decisions without being informed, and I'm not aware of Leah's entire back-story to inform you of it.

It isn't like if the wolves pick mates, that the humans have to blindly follow them. Samuel's wolf picked Mercy as a mate, but he ignored it for years, until it was too late. Since Briggs doesn't go into the Bran & Leah love story, or background, there's no way we can know for sure just how they went. But Leah doesn't hate Bran.

I never said that? I just said that Mercy has abandonment issues, and that, on top of the fact her would-be step-mother had issues with not only her but other females in the pack, would have influenced her relationship with females. I don't remember how old Mercy was when she was dropped off, but for some reason I think she was a teenager.

I personally find it rather disgusting that you assume that Bran rapes his wife/mate? Briggs doesn't shy around the issues of rape in her books (Anna, as mentioned in another comment, is gangraped by her pack to break her spirit). However, Bran is so enraged at the very idea of rape that he almost loses control of his wolf at one point. I don't think he rapes his own wife.