Why does everybody hate the Dario Argento version, where the Phantom and Christine ARE IN LOVE?

I didn't know someone liked the Dario Argento version... あなた learn a new thing everyday I guess..

Anyway, speaking for myself, though like the idea of the phantom getting Christine, it just isn't plausible there are to many factors in the way, and I'm not talking about Raoul. If Raoul were the only reason I don't think LND would be hated so much.
The Argento version is not only a bad movie but its a bad reputation of the phantom himself. He has no physical disabilities, so why is he tortured? why is he even underneath the opera house to begin with? why did his parents abandoned a perfectly good baby? It doesn't make any sense, and as a viewer あなた don't really care about the phantom because the movie only shows him as creepy, ラット obsession (which they sorta explain as telepathic speech, sorta) no matter how あなた slice it putting a ラット down your pants is creepy and all it made me want to do is turn the movie off not root for this freak to have a romance. At least in the original novel and other adaptations the phantom usually comes off (at first) as suave and classy (esp. in the ALW version) but in this version he is weird from the start, it made me hope Christine would run toward Raoul.
But with all that 発言しました no matter which version C/E could still never be together because the Phantom is a sociopath, and would never be able to hold down a relationship and for the simple fact that Christine did not romantically 愛 him. I think if Erik had killed Raoul as he threaten that would have pushed Christine to truly hate him.