Disclaimer: I am not making any ethical judgments here, just observing.
This problem didn’t really exist before for three reasons.
One, widespread access to prostitution and its social acceptability. Reading books from earlier centuries, it’s noticeable how common this was and how little anyone seemed to be socially stigmatized by going to a brothel.
Two, enforced monogamy. Our current culture is centered on removing restrictions. And as with every market, removing the restrictions on sexual access means the top players get more “resources” while the bottom get none. Monogamy was historically the solution to this.
Three, the primary model of marriage being one of love or connection, and not of uniting families, having children, or passing on property. This, combined with our consumeristic society, leads people to always assume that a better option is available. Add easy divorce laws and Tinder, and the incentives for trying to work out any problems (or even get into a relationship in the first place) are nearly nonexistent.
It really doesn’t seem like the culture is going to accept enforcing monogamy (2) or restrictions on divorce (3), but it does seem like (1) might be legalized at some point. Personally, that seems something of a dystopian solution to the problem, but that’s just me.