Which is just ignoring the question. Kinda funny to say "hey you ignored the context" in your literally immediately previous post, only to then do that to my own.
Typical completely useless "advice". Not worth further response.
One v one? Odd group, considering that means the singular player really is exactly as essential as the GM.
Hypothetical: three out of five players are really really jazzed about Eberron and have specifically made clear numerous times in the past (since you demand that we only consider the tiny slice of the hobby that constitutes a stable 20-year-plus group) that they think Greyhawk is not a particularly good setting. The GM, however, thinks it's the best thing ever written and thus has tried, for (say) the tenth time, to make Greyhawk But Homebrewed So Everyone Should Love It. The other two players aren't opposed, but aren't compelled either.
Now what? Seems to me this is far more like a thing that would actually happen with the GM who adamantly refuses to ever consider the players' interests because "it's my campaign".