The tsunami in 2005 was a turning point for me. I don't understand how any sort of God would have allowed that. Bad things happen all the time of course but that impacted me for some reason. It defies JW explanations for natural disasters too because they often claim that even apparent 'acts of God' have human causes - like how dams can cause earthquakes and global warming might explain extreme storms. It is a bit harder to see how humans could in any way be said to have caused a tsunami. (though no doubt there are attempts to do so by some believers)
If there is a God and he has got a reason for why he allows things like that then I would be interested to hear it of course. But at this point I am doubtful. I like Sartre's ironic quip: 'God doesn't exist, the bastard'. As if failure to exist is merely the latest in a long line of God's failings.
Plus my life made a lot of sense when I believed God was watching over everthing. Even the most insignificant daily event was coloured by my belief that there was a God, and that he was in some sense 'with' me in my life. Now existence seems to me to be a random collection of events with no course or purpose. We can of course seek to inscribe them with our own meaning, but this is temporary, like patterns in the sand at low tide. There is no enduring meaning to anything. It's a bit depressing, but happily daily life preoccupies me most of the time and I tend not to think about it.