If you are interested in reading a positive use of red pill information, this formulation is pretty good:
https://www.pastor.trinity-pres.net/blog/15-men-women/51-the-folk-wisdom-of-the-red-pillA search about "red pill" will generally lead you to dozens of websites saying it is the spawn of satan… because it is extremely anti-feminist. Women are not particularly interested in men knowing what women really find attractive. Most would rather men think that women are superior, wonderful beings who are attracted to men being nice, and kind, and doing things for them. That makes it a lot easier for women to manipulate men.
In reality, women are mainly attracted by dominance (confidence, masculinity, strength, power, status, money) without regard to how kind or good the man is. (Not that kindness in a man is of no value to a women- certainly not, especially when their children are involved, but it isn't particularly sexually attractive).
When some men learn that what women (and society) have been telling them about the relationship between the sexes is basically false, they get really bitter and hateful. They may realize why they have seen awful men being far more successful with women than them, when they have been trying to be "nice" to women. Hence the fact that some of the red pill men become horrible, manipulative people, or just swear off women.
Of course, the above information is also helpful to men who want to be a better boyfriend, husband, or father- men who love women, and want to be what they really need, and to make their female counterpart happy. There is no need to be a bad person at all to be a red pill man- just try and be a strong, assertive man.
I make no assertion to being particularly good at mastering the above information myself. I've got my own challenges that I have discussed elsewhere on this board.