Here's what I'd say...
I hate god for being such an insufferable prick all the time.
I hate god for being an ace in the hole for all the religious crazies out there who think it's a great idea to have 8 kids and get them all an SUV.
I hate god for giving doctrine to his followers that allows them to not only target and exterminate people of other creeds, colors or backgrounds, but to feel morally superiour while doing so.
I hate god for trying to make all the nuts think that life will be so much better after they're dead.
I hate god for making this earth a pale shadow of the garden, just so everyone feels ok about destroying it.
I hate god for promising us an endtime, because all of a sudden current events such as war, hunger and pollution seem much less pressing.

And lastly, I hate god for making the platypus for nothing more than his own sick amusement.


All the above and more. That's why I'd hate god if I thought he even existed. As such, I think it's the just mindset that blows...