The sheer size and complexity of the universe and the world around us argues for the existence of God, but our children are told that it all resulted by chance, over time.
How about a god. The point you're missing that is embedded in the first amendment is freedom of religion.
You might like to think that your God is the one that did it all but unfortunately that would be enforcing your will on everyone else.
Sorry but if you do that you've created your own regime as you note.
That is fine as long as God does not exist, but if there is a God, it is a disaster for the children taught under such a regime. They are taught day after day that the official position of the state and nation is that there is no God, no Creator, and we evolved by mere chance over time from nothing to everything.
It's your job to teach your own kids about God. I'll do the same with mine.
For those who understand no explanation is needed, ...For those who don't none will.