I too am aware of Braxman and his continuous nonsense. I watched a few of his videos back in the day. Fortunately they were not very technical and led me to actually valuable information along the way, when I started researching further. He sadly is technically savvy enough to develop products himself that he can sell to his audience, but not savvy enough to actually understand the technical intricacies of the subjects he's talking about. I would go as far as calling him the Steven Seagal of the privacy and security community.
However, the only way forward is to make sure that actually knowledgeable members call him out by exploiting the same mechanisms he does. Social media and SEO is an even playing field that can be used by anyone to reach an infinite amount of people.
If you decide to make others aware of his misinformation, make sure to keep it in a professional manner. No name calling, no accusations. Just provide a technical analysis of his claims and disprove them. It's an uphill battle that can't be won any other way sadly.
If you are a journalist or can reach one, this would also create a big splash. You would be surprised how much impact traditional media has. And it certainly makes for a good story too.
Tl;dr: don't overthink it. He will be exposed sooner or later anyway and justice will be served.