I'm actually a little bit confused as to why people find it so hard to believe in God.
Is it really easier to believe that we all "just happened" through some fluke of science? I mean really... We all came from single cell organism that after untold millions of years eventually mutated to the point where we can create wonderful things like the '68 Firebird Coupe, or the Bitcoin system? Riiiight... I call Bull Shit on that!
Do the atheists really believe this all "just happened"? Come on guys! LOL! That take's WAY more "faith" in my book than just buying into the supreme being idea.
Sorry, but I find the supreme being idea WAY more credible.
And this is why religion is so destructive and stupifying. Religion can't figure out an answer to something, so it just comes up with a convenient fairy tale to explain the problem away, without even caring if the story is supported by anything substantial or factual. Science tries to actually explain things based on observable facts and logic. In the case of where we came from, science says, "I don't know, but all the evidence seems to point to this explanation, however, I might still be wrong, and we still need to ask more questions." Religion says I don't know, but here is a nice story, now stop asking questions."
As to your question of "why people find it so hard to believe in God," try to honestly believe in Santa Claus, or fairies, or leprichauns, or Superman, or Harry Potter. Believe that they exist and are true with all your heart. If you can't convince yourself that they exist, no matter how hard you try, because in the back of your mind you keep thinking that such an idea is absurd, then you'll know why it's so hard. Some people just include the idea of god among the rest of the absurd things to believe in.