Eh, i think that take is pretty ableist tbh. First of all, "moving on from your highschool trauma" is something that takes decades for some people, and some are never able to process it. People are traumatized in different ways and different severity, have different ressources to process their experiences and that just means you can't expect everybody to react in the same way you or i do. And, as with most trauma, the majority of the people affected by it do not hurt others due to their trauma, but direct all their anguish inwards and hurt themselves. It's fucking vile what kids can do to their classmates and how much long-term damage that causes. It doesn't sit right with me to fashion that into a handy pseudopsychological explanation for neofascist online cultures.
Are some bullied nerds marks for reactionary radicalization? Yes, Gamergate culture and incel ideology exist for a reason, but what turns the young men who go down that pipeline into reactionaries are the material conditions of crisis capitalism where preserving the privilege they have as white cishet dudes becomes a "crab in a bucket" response to increased proletarization, in many cases also a predisposition towards reactionary ideas due their socialization in a conservative home, a massive indoctrination infrastructure on sites like reddit, 4chan, youtube etc. and the willingness to buy into all that shit. At the end of the day, it's a choice. Granted, not a free choice like liberals imagine decision-making processes to be, but the factors that nudge these people towards a decision for fascism are more complex than "being an unfucked, friendless nerd". Not to mention that same or similar pipelines have the same effects on a lot of people who've been stereotypical bullies in their youth, or have just always fallen outside of these stereotypes.
I've gotten a gastroscopy without anesthesia and i do not recommend it. It's like swallowing a huge-ass branch, it sucks. From all i know, colonoscopy is worse. They do short term anesthesia with propofol for this stuff, it's much easier to recover from than the general anesthesia you'd get for a surgery.