Think about it. I come to you and I tell you about an invisible creature that has no beginning and no end and it created you and cares about you and built a heaven for you and a hell for your enemies. SHould I go on?
Point is, the chances of my invisible creature being real are not 50/50. And do you have to ask me if the odds are in favor or against it?
Without the organized religions, what evidence do you have for God? You have nothing. So without the stories that god visited and told your ancestors these stories you seem to believe, the odds of a god existing are very very low.
Could there be a generic creator that created the universe? Sure there could. I would have to be a god to know for sure if there is or isn't so in a way I'm agnostic. I don't know either way. BUT, do I lean one way or the other? Oh yea! I lean towards believing there is no god.
Could there be a creator? Sure. But no evidence to date suggest there is one.
Forget about "organized religions" for a minute. We have self-evidence of a spiritual creator greater than ourselves. If we didn't, we'd still be living in the trees with the monkeys... our common ancestors. Something obviously inspired us... made us not afraid to tame fire... to invent the wheel... to climb out of our tree and explore the universe around us.
We can argue philosophically over what that thing is... I think you assume it must be some kind of "invisible creature" because that's how you often describe it... but I don't believe in invisible creatures. Creatures are physical and have physical attributes. This guiding force is beyond the physical, it doesn't have those attributes.
You say that "no evidence suggests a creator" but you can't physically explain how physics created physics. It's a dichotomy... a paradox. In order for physical nature to exist, it has to have some source of creation. We observe physical nature exists and has entropy... the steady and constant devolving from order to chaos... so we have to presume physical nature had a beginning point. But how did it manage to create itself if it didn't exist? Occam's Razor says the simplest answers are usually the best. In this case, the simplest answer is a spiritual force created physical nature.
Now, perhaps you need to replace "spiritual force" with some other phrase in order to distinguish it in your mind away from religious beliefs... but do that... call it something else if you wish... that is what created us.