OK. But first we need to make sure where is the goal.
Creationism is: things are created.
What kind of evidence would support that?
So, there is a thing. We would trace it back to find its origin.
If we found an explainable origin, then it is not created.
But if we found no such origin, could we say it was created?
If not, then what do you expect to see in order to take is as an evidence of creation?
Do you expect to see something like a dove was created in the hand of a magician? Even you are convinced that is true creation, how about people who were not in the theater? How do you present any evidence to them? You would show the dove. Is the dove an evidence, or a proof of the creation?
God created the seawater of the earth when you were not there. Now, you see the water, and you ask: where is the evidence of creation? I said the seawater itself is an evidence. I did not say the existence of seawater is a proof. So, how do you expect me to continue the argument? I certainly can not ask God do it again.
If you can not pass this hurdle of finding what kind of evidence you expect to see, then making any further argument is simply a waste of time.
To give you a contrast: I know exactly what evidence I want to see on the idea of evolution. Unfortunately, no one can show me what I want to see.