a redpiller is something completely different from an incel, dude
A Red Piller is essentially someone who believes that women are actually the privileged group instead of men. The argument I've heard is such: Although women don't inhabit the very highest echelons of power, the vast majority of men don't either. So on the base level, women have it better. People hold doors open for them, they get less severe sentences (and charged less) in court, a woman can get men to give them free things at a club whereas if a man asked for the same from a woman he'd be told to fuck off, women have large and efficient support groups while men don't, etc.
it's taken from the matrix, where you take the red pill and awaken to the truth of the world.