You're confusing "likely" with realistic IRL. Is it likely (IRL) that Walt would completely blow out a floor of a building with a grain of fulminated mercury, while leaving everyone in the room unharmed? No, but that's what happened. That's the type of story Vince Gilligan chose to tell. I'm not going to write off the show as a dream because of that.
Mr. Robot is about the very unlikely scenario of a super hacker saving the world, but it also wraps up with the idea of the audience desire to fill that sort of role and how that sort of character is not a real person, but more of a fantasy , and eventually you have to come back to normal and stop trying to hack the planet. The multiple personalities in the show always operated according in a somewhat magical, overpowered sense. That's just a basic conceit of the show.