I am going to hitchhike that top comment to give a proper answer to OP's post since I can't see one in the top comments.

Don't just split every situation into AF/BB

Yes and no.

Every female sexual strategy is to be split into AF/BB.

"Situations" are not to be split into anything.

The idea that "situations" can be split into AF/BB is a massive misunderstanding or redpill theory.

The idea that men are to be split into two groups, one that is "sexually attractive" and the other one that is "pathetically repulsive" is a massive misunderstanding of red pill theory.

AF/BB are not a dichotomous classification of men. It's the statement that the sexual strategy of women is dual: on one side they are sexually attracted to some sexually attractive man, and other other side, she is willing to exchange sex for providing (and the insurance of future continued provision) from a not-necessary-attractive man.

Add to this Hypergamy (or the basic behavior of humans to maximize their return) and the sexual strategy of woman becomes clear: Fuck the most sexually attractive man you can get at the moment, and obtain providing from the most dependable/wealthiest man you can get at the moment.

And every "situation" can be explained in the light of that sexual strategy.

In your thought experiment, /u/JustHornyLoser, what you have is one woman who found one man "the most sexually attractive she could get at the moment", and then found an even more attractive the next moment.

This doesn't mean that the first guy automatically becomes a pathetically repulsive loser. It doesn't mean that the first guy magically becomes a good provider.

So you're right when you say "don't automatically assume that if someone gets cheated on he is BB".

AF/BB (and Hyeprgamy) does rule the world of the Sexual Market Place. Everything can be basically explained by it. The problem is not in that model, it's in how the basic redpill redditor on this sub misunderstands that model.