somehow you are qualified to critique the science.
Science fiction about what existed before the creation of the universe is not science.
No
How do you know?
There was no explosion
in terms of matter ( re:pressure temperature density), if no matter existed yet to explode, it did not, but in terms of expansion and dispersion of the contents of the universe suddenly doubling in size every fraction of a second, it is just a matter of semantics -but you are correct, according to what scientists think at this time describes the big bang, it was not an explosion in any physical sense as setting off a bomb. (this is a great point you made.)