He took a gamble.
He chose to join a religion that treats its non-believing children badly..... AND ....
He chose to join a religion that had a history of failed prophetic mumbo jumbo. Did he stop for one minute and ask himself what he would do if his daughter found out about the WT's failures and didn't want to be associated with those failures? You can probably think of other things he overlooked too.
He chose to raise his daughter in it. You didn't ask him to to that. You were just an innocent child. He was supposed to protect you, not fill your head with nonsense. Did he ever discourage you from questioning the bOrg? Mine did. I lay it on thick that he should have encouraged questions when I was a kid instead of threatening me with "disappointing your Heavenly Father" to stop any questions. We could have tidied up this business when I was a kid instead of leaving it until I was an adult with my own kids.
He gambled and he lost. Jehovah has consistently proved that the WT doesn't know what it's talking about by not showing up to stop them looking like a bunch of fools. Now he has to man up and deal with the consequences just like Harold Camping has to.
Don't let him use guilt on you. Use it on him.
I have made sure my parents know exactly how I feel about their church, and the behaviour of its members, using examples from our lives and friends & family and WT literature. Nothing else. They also know that I know when they lie to me because I pick them up on it every time.
It's a disfunctional relationship at best, but it is a relationship.