Here's the practical thing: if "everything needs a creator" counts as proof, then it proves every rival god equally, and we're back to 4,000 incompatible claims with no way to choose. That's not a foundation, it's a blank check.
And take the train. Sure, a chain of cars needs something to push it, but an endless series with no first car isn't obviously impossible. Even granting a first cause, jumping from uncaused to omniscient is a leap. Being before time doesn't mean you've experienced everything. The brighter news is we don't need that leap to feel wonder.