Sounds rather Pantheistic to me. The universe created itself out of nothing over time? What was before the singularity?
But no one has said that.
The universe IS the result of the initial expansion. There is no mention of anything creating itself. That is as silly as pointing at an apple and saying the apple created itself. The Universe simply is.
And the answer to "What was before the singularity" is "We don't know yet." Throwing in some imaginary word like "God" tells us nothing and adds no value or meaning.