AB,
It is not natural for more complex thing to arise from less complex.
Of course it is. How on earth can you not know that?
It is demonstrable that naturally occurring events tend to destroy complexity rather than create it.
You're thinking of entropy. Entropy increases in isolated systems - it can
decrease in open ones. Try looking up the second law of thermodynamics.
It is why all living things will eventually die.
If you’re thinking of the heat death of the universe, then probably yes. That tells you nothing though about the emergence of life in the meantime.
It was a miracle that the first living cell was not killed off by natural forces before it reproduced.
How do you know that it wasn’t?
The ability of living things to reproduce is evidence of intentional design to combat the natural events which ultimately destroy life and generate ever increasing chaos.
Childish, evidence-denying bollocks. FFS, at least try to read something about this before making a fool of yourself again here.