I and others have demonstrated we know quite a bit more than you about your religion and the books upon which you argue it is predicated. We don't believe any of it is true, but we can demonstrate a superior grasp of it. You need to find an argument that isn't based on the presumption that all believers know more about a religion than any non-believer.
—but over the decades people have tried to discredit the truth—
You can't discredit what has no proof in the first place. Over the decades -- centuries, really -- rational people have been asking for proof that your fairy tales are true. You have none. Given what you do with those fairy tales (see below) they are right to continue demanding proof.
So you hope that the Scriptures are not true so that you do not have to accommodate the truth.
Quite the opposite. I see no evidence that the Bible is factual, that it is anything more than the recorded superstitions and fanciful pseudo-history of various peoples in the ancient Middle East. I see no evidence that your god exists.
What I do see, however, are centuries of oppression instigated by certain humans on the basis of these fairy tales. People take them literally, or at least seriously. On the strength of that personal belief only they justify depriving other people of their rights, up to an including their lives. This is wrong, and no amount of dogmatic expression of that personal belief suffices to justify it.
And you are potentially one of the worst offenders. You propose racist and sexist policies which you attribute to your god, as if that excused them from any rational scrutiny. You propose to aggrandize yourself by claiming an appointment as god's special messenger. All that is predicated on the blind faith that the Bible is factually true. I'm not the least scared, since no evidence supports your claim. You should be scared -- again, because no evidence supports your claim. You insist that the Bible must be true so that you can continue looking forward to your reign of terror, without having to justify it to a rational people.
Well guess what: unless your god wants to make a personal appearance and ratify any of your spewage, no one cares. The world's forbearance heretofore with religious dogmatism is wearing thin. We are tired of oppressive public policy and egregiously unprincipled behavior excused by nothing more substantial than a profession of faith.
how could such a wonderful creation just come about without a designer?
Prove it's a creation first, and not just happenstance over billions of years. Then you can argue about who may have created it.