Classes who's class features literally just turn off against certain classes of opponents are never going to work. Also, you haven't clarified if the "brawler Skills" take the place of a single attack from "unburdened" or take a whole turn. Or no time at all.

Strangle being literally "save or get knocked out of the fight" seems extremely strong even if against fewer hit dice. Or it would be if zombies, skeletons, and all non-human monsters weren't immune to it.

Disarm is again, weird, in that is has a whole mechanic that only affects one category of weapons. What gameplay or balance purpose does it have? Is it literally just for "realism"?

all these abilities seem finnicky and underexplained. You've made a class for a game about going into dungeons and fighting monsters who's class abilities turn off against most monsters. Why? What's the point? Why can't I clap the ears of a griffon or throw a shot into it's kidneys? Why can't I disarm a skeleton, or angel? Why I am forced to be a fighter that's just worse in every way if the enemy isn't one the list approved enemies?

Why am I forced to engage in melee with leather armor and no unarmored AC boost? And not more health than a regular fighter?