(Wasn't sure if I should tag it like this or character build.)
Play through the game. Attempt to screw up every major questline (Bail on the Aldecaldos to get Saul killed, kill Mako, get River to raid the wrong place, Flaming Crotch Man becomes Exploded Crotch Man, etc.)
Screw up as many Fixer missions as you can so that none of them like you all that much.
Fail as many sidequests as possible, unless succeeding makes you more enemies.
Piss off Arasaka (doing the Main quest and occasionally going loud with murders, but spare Takemura so he'll hate you)
Screw over NuSA in Phantom Liberty.
Leave as many enemies with grudges on you alive as possible (and yes, that means going non-lethal against Placide.) Otherwise, if they're unlikely to hold a grudge personally, kill them to make more people hate you.
The only questline you don't screw up is Johnny's, so keep him as good a friend as you can.
Then, have Rogue help you with the ending quest so that she dies.
Finally, with the last choice of the game… leave Johnny your body. Just fucking bail and leave him holding the bag for all of your failures and the many, many people who want you dead now, meanwhile you run off and escape the consequences of your actions to go run off with Johnny's ex girlfriend.
Have fun Johnny!
Being a netrunner is probably a good idea for this path, and Johnny doesn't know much about hacking so many of your implants won't even be that useful for him in his new life.