The earth, created 6000 years ago with 4.6 billion years of history, is called the Omphalos Hypothesis; which I don't subscribe to.
I contend that the earth was created 6000 years ago with 4.6 billion years of age.
But other than handwaving, you have yet to get rid of the history. I mean, we have a history of human civiliation going back around 10000 years, cave painting going back even further than that. We ahve varves and tree rings and ice layes, we have radiometric data, we have evidence of impacts, we have supernova remanent, we have magnetic field strengths.
We have history. Full stop. End of story. Until someone shows how all those things and everthing else is false, then we are left with two options:
a) the earth is 4.6 billion years old and has been around for 4.6 billion years, picking up the scars of its years as it goes.
b)the earth was created 6000 years ago (or last thursday) but God (or Eris, Loki, Susanoo or whoever else) went to a lot of effort to make it look like option a is correct.
We will never be able to tell which one of those two options is right. We can only look at what is there. Humanity cannot stop an omnipotent deity rearranging reality to make us believe whatever they want. But, we cannot learn anything from assuming the world is being reranged to suit said deity's whims. You will never find oil by assuming God did a massive cleanup job following his fit of pique and the flood. You will only make models which are based on evidence using science. So, the point is, even if God did it one way, if he left all the evidence pointing the otherway, it's useless to science even if it's acually "wrong".