Especially pointed question since the statement implies someone has crossed the chasm of the physical universe in order to measure this.
(since "all of physical universe is less complex than a single human brain" and the physical universe contains around 6.7 billion brains (that we know of))
My point was that if you are restricting the comparison to the physical universe then logically you must be implying the brain extends beyond the physical universe somehow -- since there is more than one brain in the physical universe. Your subsequent statements in this thread confirmed you have this opinion.
If true, then it has an undefined and immeasurable complexity. You can't make all these statements about it, you can't measure it, and you have no context to even begin to talk about it. You can't even make assertions about what the measurement of complexity itself would be ("infinitely more" is just as nonsensical as a finite number more because we do not know what the units of a complexity measurement would be -- if "units" even makes sense in the "beyond").
(since "all of physical universe is less complex than a single human brain" and the physical universe contains around 6.7 billion brains (that we know of))