The way I see it. The Wall isn't really about looks for me. The Wall is basically when you've reached that midlife crisis point and you're overcompensating by doing something very fucking cringe.
If that is your definition of The Wall then you have been very misinformed.
A 18-29 year old woman has both sexual and relationship interest from alpha males/Chads/top 20% of men and beta males/bottom 80% of men. Ideally she wants to fuck and/or marry Chad. Here, she has reached the peak of her life. She can choose any man she desires.
A 30+ year old woman no longer has relationship interest from Chads. Chads don't mind pumping and dumping her but won't marry her. Beta males are still interested in her sexually and as a wife but she's not interested in them. She might decide to "settle down" and marry the beta male but she will never be truly satisfied. She has "hit the wall" because Chad is no longer interested in marrying her. If Chad is no longer interested in fucking her, then she has hit the wall even harder.
Notes:
1) "The Wall" is a universal concept. I think it was Japan or China that calls 25+ year old women as "Christmas Cakes:" because nobody wants them after 25. Especially not to marry.
2) Different women age differently so she might hit the wall earlier or later. If she has good genes, she might still look youthful in her 30's. However, some women (Western women) often look old and used up even in their early 20's because of genes and/or rough lifestyles.
3) A woman that has hit the wall can still have 100+ matches on dating apps. Even a woman that looks like a pig will have lots of matches. But even if she has hundreds of matches, she might still not be satisfied because Chad isn't on there. So even with all these options in men, she doesn't like her options so we can still say she hit the wall.
4) Men can hit the wall the same way women can hit the wall and have their own advantages and disadvantages.
4a) A disadvantage of men is that even a Chad or a Pretty Boy who loses his hair and becomes bald can be said to have hit the wall unless he has a Jeremy Meeks/Vin Diesel-style skull and facial structure. As Incels often say, baldness is a death sentence.
4b) An advantage of men is that they don't use makeup so they tend to age more gracefully. For women, makeup is practically a mask that hides her true face.
4c) A disadvantage of men is that it takes work to have a fit body with defined abs that satisfies the female gaze. In contrast, this is an advantage of women: all they need to do is not be fat to satisfy 99% of the male gaze.
4d) An advantage of men is that they have low/reasonable standards so they are perfectly happy to have a 5/10 wife. A disadvantage of women is that that same 5/10 wife demands and expects a 7/10 husband.
This is almost entirely off-topic so I'll try to bring it back on-topic:
This whole uglification of women in Western gaming is being spearheaded by women who have hit the wall and are insecure about seeing attractive video game women.
I have a reddit screenshot of really good explanation about women being threatened by fictional attractive video game characters. If I find it, I'll post it.