Agreed. But brilliant does not rouse/incite an entire country to support a war of conquest and extermination, much less open a foredoomed 2nd front against an opponent that Napoleon's experience should have been a cautionary tale against pursuing.
Wasn't too intelligent either, thinking that you wouldn't turn more largely populated nations against you; including the most industrialized one that he disparaged as a nation of mongrels.
Well, as it turned out, junk yard dogs, a lot of 'em, against 'pure bread' German Shepherds.