If an experiment fails to prove a theory, that does not mean the theory is right or wrong. The author did not prove that the adrenochrome story was wrong. The article is a hit piece against conservatives and advocates censorship, which was done not only on the adrenochrome story, but on numerous other areas such as COVID, distrust on the 2020 election results, vaccine skepticism, etc.
Unless the adrenochrome story is corroborated by a defecting insider, a modern day version of Whittaker Chambers or Joe Valachi, it is just another unproven tale.