To be fair to Brad, the game does a shit job at explaining most of its concepts beyond shoot, parry and hit.
The boost hit is never explained anywhere, neither are perfect parrys or charging up your dash or that you can parry projectiles etc. etc.
I guess this comes more naturally to me because I play a lot of character action games. Literally the first thing I did after the game tells you about the charge attack is trying to dash while charging. As for perfect parries I did it by accident in the first fight and understood what was happening. Figured out the projectile parry in the third fight when the boss puts those circles around you. You are right though they should just spell it out in the tutorial. The tutorial explicitly tells you about the charged slash stun however and Brad did not seem to know that either. All things considered he didn't play too poorly especially when you consider that he has to talk over it which I imagine is fucked hard. That being said I also kind of enjoy figuring out these mechanics by myself. W101 had a lot of that stuff too and it feels awesome when you put the little hints together and it works out.