I don't think that the total creation took place in six days as we now measure time. If we can confirm, say, the Big Bang theory, that doesn't at all cause me to question my faith that God created the Big Bang. ↗
The radiation left over from the Big Bang is the same as that in your microwave oven but very much less powerful. It would heat your pizza only to minus 271.3*C - not much good for defrosting the pizza, let alone cooking it. ↗
