This is the usual reductio ad nihilim ploy of creationism : Materialistic theories can't answer everything, therefore they answer nothing. But creationism does answer everything, therefore it is true.
Galileo addresses this in his essay, The Assayer, in which he advocates the honest reply, "I do not know", in that case in reference to the explanation for the path of comets. ... old hat to us!
Something had to have exploded. What was that thing? How did it get there? What was it?