I have lots of information.

No you don't. It's literally impossible as far as our current understand goes. If you do, why have you avoided providing it. You've just speculated stuff just as I have. Stop pretending you're more knowledgeable, smart, or special than you are.

You require that nothing must have happened before big bang for an infinite time.

Our current knowledge points towards heat death of the universe, not a big crunch. If heat death is a possible outcome, and there's infinite time, it should have happened before. The probability that it's an option and it hasn't happened is zero. Other things could happen too, but if anything can happen that prevents it from continuing forever then there's effectively no chance it didn't before. Infinite time means we aren't the first.

Since your standpoint has no scientific evidence, every other must also not. But not so. It's not untested. It isn't impossible to know. You just have to research the topic.

Again, you're making a claim to knowledge. Prove it. It doesn't exist. We can't peer past the CMB. That's the earliest information we have, or can have as far as we know right now. Anything else is unknowable and certainly untestable. If not, prove it. You spoke of burden of proof earlier, and that's for claims of knowledge. You're making a claim of knowledge. Provide proof.

You will move the goalpost out of scientific realism forever...

I did not move that goalpost. There are limits to scientific knowledge, correct? Or do you think this isn't true? If not, you're not discussing scientific realism. You're talking about some kind of mysticism. I'm not the one moving the goalposts. You did that if you're pushing it beyond the definition.