The article is interesting but painful to read; it's as though it was written by a near-illiterate who painstakingly reviewed every letter over and over to eliminate obvious mistakes. Then, when you've survived the pain, you meet the usual suspects: "Who wrote Shakespeare's plays?" "Look, the Knights Templar!" "It's a Freemason conspiracy!" I wasted my time here.
I didn't notice any spelling or grammar mistakes and it pulled me in enough to make me read the whole thing. It's very, very thorough; someone did their research and spent a lot of time writing this.
He was only explaining popular theories that have been proposed. Not claiming there is any truth to them. This is like saying wikipedia isn't reliable because they list the exact same crazy theories and even some other ones in their documentation of the site: https://en.wikipedia.org/wiki/Oak_Island#Treasure_theories
Near-illiterate seems like an unnecessarily harsh insult. I had no issues reading it, and the author doesn't seem to believe the Shakespeare and Freemason theories, they're just cataloguing the most common explanations.