The only book I rage-hate is "50 Shades of should never have been published". Not because it used to be fanfic (that's how many good books got started", but because it's just so bad and totally glorifies an abusive relationship. The only good thing about having read it, is that I got to write the snarkiest review I've ever written .
There are other books I hate, but none that actually make me furious got published like that one.
This! OMG this.
And the BDSM isn't very accurate, either.