Having only seen the first RE (and once was enough; I don't like gory stuff), Alice annoyed me because she was perpetually operating in God-mode. She never faltered, was never overwhelmed, always had a smart-ass quip, and kicked everything's ass while wearing a cocktail dress and high-heeled boots. Like the female equivalent of Wolverine, only sexier and, I will admit, much less annoying and overrated. I'll also say that some of the hate she gets from the fandom is pretty sexist, as many will tear her down for having the same qualities that they praise in male characters. And I think that a lot of Katniss hate is similar. It's common for a male lead to start out the story with PTSD, be angry, bitter and resentful at the world, and to often make bad decisions because there are no good ones available, and who doesn't care about being likable because they've got much bigger things to worry about. That kind of male character is practically expected in action movies, but when those exact same traits are seen in a 16-year-old girl, it throws a lot of people for a loop.

Katniss is a majorly flawed and damaged character, but my argument is that not only is she supposed to be viewed as such, but also that given her circumstances it wouldn't be realistic for her to be a whole lot different.