alt Hacker NewsOnly recently learned about the 'red pill' thing by watching the 'manosphere' documentary by Louis Theroux. For others unaware how it relates to the above comment: https://en.wikipedia.org/wiki/Manosphere.
The documentary was an interesting if somewhat unsettling thing to watch.
You gotta be careful about Louis Theroux. I watched one of his old documentaries (late 90s IIRC) about South Africa with a guy who is a Afrikaner that I speak to semi-regularly on the internet. He said that while the people that Louis presented did exist, they were considered loons by the rest of the community.
Most of the documentarians from the BBC even some of the better ones like Adam Curtis, tend to distort things.
The "Red Pill" thing was stolen by these guys back in ~2018 from smaller political communities online that used it to just mean "I've been sold on an idea" usually people who were agorists / libertarians / ancaps.