Two words: Joey Bosa.
Two more: Myles Jack.
Two more: Jaylon Smith.
Two more: Jon Lotulelei.
Joey Bosa was the DRotY and BB didn't have him in his top 15. He justified it by the shallowest of shallow good not great analysis.
Myles Jack was the highest rated player on his board and after disappointing rookie year, he is an adequate LB at best.
Jaylon Smith was likely to never play according to BB then he was not going to be ready for TC, then he was unlikely to be ready for the season, and then he wasn't going to be able to play more than 20 or so snaps.
Jon Lotulelei was supposed to have an inside track for a roster spot after minicamps yet did not even make the 3rd preseason game.
That is just off the top of my head.
@xwalker and others can expound on his BS better than I.
What BB does is he makes people feel comfortable and plays unthreatening. He does it by repeatedly telling us that he is not that smart typically with a comment about his LSU education or admit that he failed as a scout. He speaks at a very simple level avoiding multisyllables like the plague. He then flatters the people he is interacting with constantly.
It is an absolute con in the truest sense of the word: he gains people's trust by lying to them. He claims that he is not that smart and humble yet he will sit there and argue a point as if he is disrespected any time someone disagrees with his takes. He milks that he was a former scout to the nth degree as he is introduced as a scout or by the title of the articles that Helman has to write for him. It's a con demonstrated through action.
If you like him then great; a lot of other people do too, but I for one do not buy what he is selling for what I feel are very good reason.