That wasn't his question, now was it?
He wanted to know where the "stuff" in the Universe came from, and I've provided the scientific answer.
Demanding every detail of how everything started before you will accept the scientific viability of the Big Bang theory is like demanding to know the origin of water before accepting the viability of hydrologic theory. Once that's explained to you, you'll demand to know where oxygen and hydrogen come from, and then the atomic components of each element, etc., ad nauseum. How the inflationary process started is irrelevant to the question of what effects it has.
So your exploration of this has to stop somewhere with some unknown factor that is just a name? I am not allowed to question it via logical extension? Gee... I thought the theory explained Everything.
Inflationary process sounds almost God-like to me.
I am happy to let you believe that it all started with an "inflationary process" and I won't ask you any more, I see that you accept it on faith.
I believe that the Big Bang may be an explanation for the physical universe. Just don't stomp on me for having faith in another meta-process -- "Let there be light" and for wanting other non-material souls to believe it.
No you didn't. Not even close.