All the scientific evidence shows that the shroud was not created by human beings, it is not a fake relic. We don’t even have the technology to re-create it now, let alone in the middle ages. The image was formed by a sudden burst of intense radiation, it has fossil pollen from plants in the Jerusalem area, the image itself has three dimensional code in it, the blood stains in it are real human blood, AB positive, that contains high amounts of bilirubin, indicating extreme stress and suffering prior to death. There are 360 blood stains on the shroud, indicating the person was whipped by a Roman flagrum.
There are counter arguments for every single one of these. But shroud believers are a lot like flat earthers. No matter what they're still going to believe. The simple truth is that the shroud has been recognized as a fake for centuries. It was used to make money.