Carbon dating is far from junk science. It is most accurate within the last 20,000 yrs. Many factors come into play when using this method including contamination by older material. Scientists have also developed a dating curve which is updated regularly to make this information the most accurate.
Radiocarbon dating can easily establish that humans have been on the earth for over twenty thousand years, at least twice as long as creationists are willing to allow. Therefore it should come as no surprise that creationists have been trying desperately to discredit this method for years. They have their work cut out for them, however, because radiocarbon (C-14) dating is one of the most reliable of all the radiometric dating methods.
https://en.wikipedia.org/wiki/Radioc...nd_reliability
https://ncse.com/cej/3/2/answers-to-...rbon-14-dating