"How many of you are annoyed at the couple and how many of you are saying WTF is wrong with this SM? Be honest, at least to yourselves, about how you would really react."
I'm as fond of logic pretzels and thought experiments as anyone, but this isn't either of those things. It's just a massive stretch into an abyss of dumb.
For any of that to happen, couples looking for single men would need to be in the vast majority and single men would need to be a scarce and highly valued group. Neither of those things are true.
What is true is that the largest group is single and male, next are couples, a much smaller subset of those are open to single men, and then, smallest of all, the group comprised of single women.
So, a very large group (single men) looking in two much smaller component groups means they're a glut on the market. And since many single men do not, as my grandmother used to say, know their ass from their elbows, as a group they're further devalued.
If the reality of not being in demand bothers you, leave the lifestyle in favor of vanilla dating, where at least there is something approaching parity.
In the meantime, if the clamoring of couples wanting attention ever starts to bother a single guy, he's always welcome to say he'll reach out if interested.