yep, serious FUD. But not surprising from someone who is a long time Dash investor/pumper. He writes an article about Monero privacy and yet does not mention Stealth Addresses or the upcoming I2P? Nice try but no cigar.
https://www.monero.how/how-does-monero-privacy-work
https://www.monero.how/how-does-monero-work-details-in-plain-english