I frequently see Jordan Peterson saying things like "If all the women reject you, then they're right" and "All the women reject you; is it all the women, or is it you?", which, first of all, is a highly irresponsible thing for a clinical psychologist to say, and is also a false dichotomy, since whether or not someone passes an evaluative criteria is determined by an amalgamation of one's own qualities and the stringency of the criteria - not merely one or the other. However, since he also claims that male sexual access is pareto distributed in an unconstrained sexual-landscape, where around 5% of men get all the women and all the other men get none, then it would seem that he should be advocating for a polygynous society, since 95% of men supposedly don't belong in the gene pool, as per women's evaluation, and so the pigeonhole principle implies that if more than 5% of women women are going to have partners then some men would have to have multiple partners. However, he also advocates for socially-enforced monogomy, which is a clear contradiction.

Edit:

Here are a couple references:

https://www.youtube.com/watch?v=7A6HEAKc88g

https://www.youtube.com/shorts/VVUPPwru6Tc