I don't believe in God because it hurts too much.
It hurts when people claim justice is on their side when performing atrocious acts "under God's will".
It hurts when you see people suffering from discrimination when those believe in no or a different God.
It hurts when those who believe in God think themselves damned under guidelines written 2000+ years ago.
And it hurts my brain trying to comprehend the incomprehensible. It's just not worth the trouble.