Really, I find it childish to rag on someone just because they hate Alpha And Omega or the series as a whole. It's been a repetitive thing since late 2010 and it's very unlikely that it'll end.
And why shouldn't they have the right to dismiss the film when it's got a 16% (though critics matter very little)?
You like the movie, fine. Enjoy it. Just keep your negativity to yourself and problems won't happen.