MC kills the rest of Psycho's posse (and a detective, but that's pretty much irrelevant), Psycho kills MC's brother and grandpa (and the raped girl which is somewhat important later). It's decent to that point, then there's a 5 yr or something timeskip after which MC just becomes pretty much...
It's even more frustrating when you remember that at one point during his training HE RIPPED A FUCKING TREE OUT OF THE GROUND!! Like, how the hell do you keep that down?