I know Bob is always aggro, but he's REALLY aggro now.
What's eating him?
Honestly? I think it's the fact that he's realizing his 20 years of internet warrior-ing hasn't, isn't and cannot bring the futcha he wants and he's not going to get that immortal robot body. It's a crisis of techno-faith.
Everyone has dumb ideas as a kid/adolescent.
When everyone else in his peer cohort grew up and realized that the gleaming-tower-and-spaceships future of pop culture wasn't coming in their lifetimes, if at all? They worked for what they could get in the real, existent world and not a hypothetical "future" one. While their plebian goals and baser desires (In Bob's eye) were pooh-pooh'd as meaningless, simple and below him, they at least were achieved. Bob's dreams and goals? (Which he never worked for , just thought he deserved for having visualized them?) They continued to be unfulfilled, year after year.
Nevertheless, He held on to his belief in the Human Techno-Transcendence solving all his problems and rocketing him ahead of all the bullies and Chads with a smug "You'll see" arrogance....
Bob doubled-down and sat on the corner, suitcase in hand, waiting for them to build the hyperloop by his house so he could be the first to ride it in his shiny, new, Robobob body from which he'd look down upon all who ever mocked him and laugh at their lesser existence. (Said body hasn't been build yet, but no biggie, I'm sure it will be... did you see that article in the news about that little robot that can walk up and down the stairs unassisted? It can't be that far off! I've done the only thing I have to do... pick out what color I want mine to be!)
He expected this all to happen by the year 2000
When it didn't, eh, he was bummed, but, these things can have a delay or two, right? (Darn Mayoghouls) I'll be magnanimous and accept a 5 year delay, but no more! Them scientists just got to work a little harder, don't they know the stakes?
But then time slipped to 2005... 2008... 2012... and before you know it, here we are, 2021, and the streets around his house look pretty much exactly the same not only as they did when he was kid, but when his parents were kids.... the cars are newer, but they're still cars, they don't fly, and there's no robots..... and it's painfully dawning on him that there never will be, which means he won't get his robot body before he dies.
That's what really has him cheesed: the despair setting in as he realizes he's nominally on the backside of life and his "eh, super-smaht scientists will solve it, they've got 50 years to do it!" mantra that was stupid, but comforting, when he didn't have the life experience to see it as such in his teens? That is now breaking down under the cold, hard, fact outside his very window:
The projected date of that breakthrough that will enable his immortality has now been moved well beyond his own projected check-out date, even under the best of circumstances.
And far from there being a quantum-leap in science to make up for that deferred success, everything he sees around him tells him science is stagnating, what with people refusing to trust THE SCIENCE (tm) that the modern left pushes.... his only shot now is a desperate hail-Mary that some supreme comic-book level intelligence somewhere will just jot down the solution to mortality on a napkin, but he now fears such a person will drop dead in the street after a passing Trump supporter who wouldn't get the jab coughs on them..... ruining everything, even though we were SO CLOSE!!!
He's TERRIFIED of the implications of this scenario and MAD at those wasted years he can't get back, and furious at all those he sees as "wasting" the resource points of the human RPG on things in the tech tree that don't bring robots. Like, ugh, sports, and
farming. (but not movies, those are important)
Since his own ego won't allow introspection, the anger has to attach to someone else.
TL : DR - Bob's mad because he's suffering the technocrat's mid-age crisis: The future he simped for arrived, and it looks less like
The Jetsons and more like
The Simpsons and they still haven't overcome that triviality that is uploading your brain into a computer so you can live forever. HOW HARD COULD IT BE??!