Ex Nihilo.
The strongest evidence of the existence of God or something like that, is the beginning of creation: created from nothing. That all matter came from nothing and then to say that all creation was therefore a fluke, (I say good luck with that), and you look at the complexity of the creation just presents itself with many unresolved problems. Gravity cannot have created the universe, because outside the universe, gravity did not exist. The universe could not have caused itself to exist, because it did not exist prior. For this reason, a multiverse is then suggested, to which I say, you just extend the problem further.
Unless the Second Law of Thermodynamics is false, 'order cannot come out of chaos'
Side note: A lot of people are drawn to religions such as Christianity through relationships. When you love someone one, is it just temporal in the sense that you're brain's instinct is pumping certain chemicals to produce certain emotions. Or what about when you feel guilty, is it again because of evolutionary behaviours? Are we reducing the good things and bad things we do to chance, or even the fate of the universe?
I have mentioned this I think before. Is the real reason you don't believe God exists, is you don't want to be held accountable to him?