We aren't at the beautiful ones phase yet. I think we are currently in the stagnation phase, where a large portion of males stop interacting with females. Reason in the study was that defending territory became harder as the population increased so only the most aggressive of males but up with this level of competition. The males who decided to withdraw from society basically ended up ignoring females, some rats turning full on homo and started fucking other male rats. The withdrawn males still knew how to be a rat so they would develop social heiarchies and some would mate with the females, but not as many as before. Females started to take over the roles of the males, less babies are born, and the young do not get as much care from the mothers since the mothers are too busy trying to act like males.
The "beautiful ones" phase comes after, is when the young becomes so socially isolated that they simply do not know how to be a rat. They have no desire to mate and just sit around primping themselves because that is what feels good to them. Incels today most certainly know what sex is and still engage in behaviors that would hopefully make them look better to the opposite sex. That is more in line with the stagnant males than the beautiful ones.