He's too far up his own sphincter to be self aware enough to see that he is his own problem, if he wasn't such a bigoted and egotistical, mansplaining, misogynistic, racist, ableist, homophobic, transphobic, basement dwelling, gaslighting, narcissistic, petri dish of bacteria he might be able to tell that he causes 100% of the issues that he has.
People like Brigham have a very skewed view of themselves and others which is why he always thinks things are everyone else's fault when it's him that's to blame. I'd hazard a guess that he was the type that threw tantrums if he wasn't allowed to win at every single game (let's face it, he probably still does.)