Would it be so wrong if you DO like it? You can like something while still realizing it's very problematic. Hell, I like Twilight and I've criticized the fuck out of it. I think part of the reason I like it is because it's so awful and strangely entertaining at the same time.

edit: Haven't read Fifty Shades of Grey yet though. I'm trying to hold my judgement for it, but from the snippets I've read it seems too bad even for me (and I LOVE shitty books. Guess how many Sookie Stackhouse Mysteries books I've read? All of them)