mickey has no use for real friends because he doesn't have any. In fact, if you can't tell, he lives his life pretending he's always in the "glory of the past" which of course is littered with virtual friendships with losers like "Tuna" and other self-created unsavory characters, self-denigrating bum-lifestyle "adventures" before going broke in Nevada, and a cache of silly stories only a toothless mother could love.

It is the perfect portal for someone with no life or reason to live it, to have entered into the anonymous internet age, where even two-bit loner/losers can make up an existence they believe, as low-life as it may be, puts them in the upper echelon of a society they badly missed out on.

As such, we see the constant barrage of vulgarity, alcohol-driven threats, and a violent personality that only PlayStation or X-Box could re-create. IE, he lives to make enemies.