There's several reason why this theory sucks:

Heavily Undermines our faith and Science of Gods, Spirits, Extraterrestrials, UFOs, Inner-terrestrials, Intelligent life other than Humans like us, Dinosaurs and other prehistoric creatures living in modern day, Magics, Advanced technology in ancient times, and tons of Other Real life Sci-fi and Fantasy.
Makes mankind arrogant, materialistic, godless, Ignorant to Sci-fi and Supernatural origins of Human and Nature.
Makes us ignorant to Conspiracy theories
this theory is core of Mainstream Science
Believing this theory makes you mostly skeptical to Gods, Spirits, Extraterrestrials, UFOs, Inner-terrestrials, Intelligent life other than Humans like us, Dinosaurs and other prehistoric creatures living in modern day, Magics, Advanced technology in ancient times, and tons of Other Real life Sci-fi and Fantasy

Unfortunately Much of people in the globe particularly since the fall of berlin wall believe this theory excessively except the last skeptics of this theory and this theory for the modern Corporate-Capitalist Globalists are just like Geocentrism for medieval churches.

Most people do believe that theory

Perhaps this is the only critism about logarithmic calendar