Hello, Syamsu.
I am intending to debate with you only on the issue of whether creationism (as you describe it) is science, and on whether science has oppressed creationism (as you claim). There is much in your post that I won't address, because it is outside the realm of science.
Creationism is really just quite straighforward valid science, ...
Our disagreement already begins with the first part of your first sentence. Creationism is not science at all, so it certainly is not valid science.
Science starts by introducing its own technical terminology, and providing clear definitions of it terms. Creationism, as you have described it, fails on this requirement. I will comment in more detail when I come to the section where you introduce your basic terminology.
..., it is also common knowledge which we use every day, and really can't do without.
This is clearly wrong. There are many people, not only scientists, who do not use creationism every day, and who get along quite well without it.
Far from being unscientific, creationism covers a huge, and rich class of knowledge, which knowledge is oppressed by mainstream science because mainstream science can't deal with things turning out one way or another, indeterminacy.
We'll get to the "unscientific" part shortly. Here I want to disagree with your claim that creationism is oppressed by mainstream science. There is no such oppression. Science has nothing to say about creationism. Indeed, there is much that we value in our lives that is outside the realm of science, and about which science has nothing to say.
What mainstream science criticizes, are the claims that creationism is science, and the attempts to have creationism taught in the science classroom. But this is not an oppression of creationism. This is simply a defense of science against those who would attempt to undermine its rigorous standards.
Creationist theory depends on the three principles of creator, act of creation, and the created object.
Here you begin your account of creationism. You start with some primary terminology ("creator", "act of creation", "created object"). That's a good start. But if you want creationism to be a science, then you need to specify clear criteria for each of these terms. They should be criteria that anyone can apply, and such that there will be general agreement on how to apply the terms and on whether they were correctly applied. Ideally, there would also be clear relationships between the criteria for "creator", the criteria for "act of creation" and the criteria for "created object". You would then be able to use those relations to make empirically testable predictions about creation.
As it is, however, you have no clear criteria for your terms. You admit as much when you admit that the application of your terms is subjective.
Again, this is not intended as a criticism of your theory. There is much that we value that is subjective. However, it is a criticism of your claim that creationism is valid science. Quite clearly, it is not science at all.