I... never said that it did. In fact I think you misunderstand and have things swapped: Gamergate is much closer to representing the "manosphere" (which people say dates back to perhaps the 70s with the "pickup artist" content - although obviously toxic masculinity goes back to probably prior to the emergence of homo sapiens) than the Alt-Right movement, which itself began to supplant the prior Tea Party fiscal conservative movement in the USA (examples: Ted Cruz, Newt Gingrich), in contrast to the old guard Republicans (Mitch McConnell, Lindsey Graham) before that. So while populism is as old as democratic style systems (and in the more general sense significantly older than that concept even), the Alt-Right movement specifically is a relatively new one, emerging only as a result of Donald Trump's campaign when he won his first term. I remember that iconic line delivered to the news media by Kellyanne Conway where there were "facts" (e.g. names of specific places, or battles that has happened, etc.) and then there were the uh... ah... "alternative facts" that whatever Trump said simply "felt right".

Stephen Colbert, as a joke, used to call that "Truthiness", like factually speaking it doesn't have to be accurate, so long as you "feel it in your gut". So now everything - what wars we get into, tariffs applied, our entire economy, whether people get vaccinated and other overall health concerns, etc. - are all based on vibe checks, primarily of rural people. Which I suppose is what fueled the manosphere too? Like a guy can't get a girl to go out with him - maybe he isn't negging her enough!? Try a hair gel product, or buy whatever other bullshit the angry yelling man suggests, rather than e.g. getting a job for gainful employment and taking a shower.