Interesting. I don't particularly like Dumbledore overly much, but this was a bit overdone, although I suspect it was intended to be. The funny thing is, this isn't the evilest Dumbledore I've read.
Author's response
This is one of my first fics. I see canon Dumbledore as the most evil villain ever to be created. He's worse than a terrorist because he can convince people that he's sacrificing them for the greater good'. ("War: A time of good music and bad rhetoric" Nietzsche)
This is not the evilest Dumbledore I've written. Here, he's merely standoffish. I actually used my dad's (non drunk) personality for this, combined with Dumbledore's canon character. He's interested in Harry's welfare but doesn't want to get personally involved.
Alorkin