It sounds like you are heavily invested in this false dichotomy of "either multiverse, or god" - and by 'god', you off course mean the specific god you happen to believe in, and not any of the thousands of other gods that humans have believed in and still believe in.
I've brought this to your attention before, but it seems to go in one ear and out the other every time......
As has been said, ad nauseum, we do NOT know how the universe originated.
We do NOT know if the constants even CAN have a different value.
We do NOT know how the constants are determined / assigned during universe origination.
If they even can be different, we do NOT know HOW different they can be.
For all we know, it could be that there indeed is a multi-verse and that every universe that comes from it, is exactly like our own. For all we know, a space-time continuum can only be like the one we live in.
You really need to stop with all this speculation and assumption.