Took a couple decades.

At 13 I realized one's religion - and therefore whether they live in paradise or suffer for all eternity - depends almost entirely on the place of birth.

Why would God do it that way? There is only one correct religion and thousands of false ones? I would need to be very lucky to have been born into a culture that spoon fed me the one correct religion while discouraging all the others. What were the odds of me not going to hell?

From around 18 on it was religious people's behavior and politics. Why do religion's "morals" support irresponsible and hateful legislation?

Mid to late 20s I got into philosophy and realized "because God" is never the simplest answer.

Where did the universe come from? God made it of course.

But where did God come from? He was always there.

Then why couldn't the universe just be the thing that was always there? Or at least the conditions that allowed for the universe to come into existence?

Adding God into the mix only complicates the answer and makes it less likely to be true compared to whatever our current best, simplest hypothesis is.