You don't seem to understand how the false-dilemma logical fallacy works. It is a favorite rhetorical tool of Democrats and Establishment-loving Republicans.
It's not a false dilemma. It is a likely and logical outcome of organizational theory. Given enough time, McCarthy will give up. Then, Republicans will be faced with a multitude of choices and being Republicans, they are extremely unlikely to agree on just one. Eventually, the lockstep Democrats will make promises to end the chaos, and more likely than not, eventually get six wavering Republicans to join them.
The outlier hypothesis would be that McCarthy gives up, and after numerous unsuccessful votes over weeks or months, one Republican emerges to satisfy the GOP's rhetorical herd of cats. That can still happen. It's just unlikely as hell.