Some scenarios that would make cuckqueaning viable without leading to a beta uprising of virgin men:
Big wars can wipe out significant portions of the adult male population, meaning that many women are freed up to be vixens. Make these regular occurrences and the M/F ratio will be perpetually skewed enough that queaning just becomes an thing that happens by necessity. Monogamy would still reign supreme and many vixens would be looking to completely steal your man away rather than just get some satisfaction from him. However, your men might be the ones to die and then you have to be a sad vixen.
Some enemy group is defeated, their men put to the sword and their women taken as prizes. Monogamy between your people is still enforced, but no decent man would see those sexy sub-humans as a valid romantic partner so there's really no problem letting him enjoy himself with his property. They're living sex toys that you can send to him whenever you're feeling tired or kinky or just want to watch. And even if she is hotter than you and makes him moan better than you ever could, even if the number of times he comes to you for relief drops off a cliff, you can rest safe in the knowledge that she will never really be a threat to you. However, this situation would only last one generation unless it's a small society with plenty of nearby settlements to raid whenever the supply starts to run dry.
Men decided they wanted to have harems and control the gender ratio by adopting widespread artificial insemination and selecting mostly female embryos to achieve the perfect ratio. Monogamy would be completely out the window and all men would be expected, or even required, to take the correct number of wives. Cheating outside that group would still be looked down upon, but wouldn't be as big a deal unless it involved taking another man's favorite. And there would be favorites, even if all the wives are equal on paper. Men may have given themselves greater voting power so that they still hold half the say, but even if they didn't, the internal competitions between wives would see them take up his causes to curry favor and move up the internal hierarchy of the marriage. Any ideas of a sisterhood uniting against male authority would fall apart as soon as they realized betraying the group means getting a monopoly on husband cock. However, you can't have impregnating sex without fucking up the ratio unless you also have an abortion fetish.
>complete sexual openness
Sex is just sex, it doesn't mean anything and everybody can and does do it with everybody just to feel good. If marriages exist at all, they're purely for child rearing with no expectation of fidelity from either partner. However, it doesn't really feel like you're getting cucked and you're expected to sleep around too.
Waifubots are created that put fleshbag women to shame: ideal personalities, unwavering loyalty, great at housework of all sorts, impossibly sensuous holes, and fully modular. Once a man has one (or more), you are just completely obsolete to him. Why do women not have husbandobots? Who knows. Maybe their wasn't enough market demand to support their development. Maybe an early model fucked a bunch of girls to death and they got banned. Maybe the robotics industry is run by a secret cabal of cuckqueans. In any case, women as a gender are getting collectively cucked by these things. With so many men completely uninterested in human women, the entirety of the female population have to compete for the men who are either too poor to afford an AI wife or too technophobic to embrace the future. The old systems of monogamy would persist nominally, supported by the picturesque relationships between men and their robots, but in reality it would be a free for all where men have no shortage of options and so much as complaining about his cheating will get you replaced with any of a dozen eager candidates. Learning to share is the only way to keep a man. This scenario also works with genetically engineered catgirls.
An all-female race exists which needs the seed of other races to reproduce, but all offspring are of their race and thus female. If you're lucky, she'll return her prey to you once she's gotten his seed. If not, he's her husband now. As their numbers increase, sustainability becomes an issue so your race's breeding capacity is being hampered by them more and more. They realize they need to let you breed so that their daughters can fuck your sons and a new paradigm is created where each amazon takes both a male and female of your race, ensuring the female gets pregnant twice as many times as she does. Depending on individual disposition, she may cede the wife role to you and treat your man as a source of pleasure and semen she can access at any time or she may claim wife status and only allow you access to him on fertile days and only until she's bred you enough times to have a child of her own with her hubby.