The reasoning behind having the best offer and not setting the auto-reject has been explained before, at great and exhaustive length. If people want to call it "complaining", they either don't understand it, or don't want to understand it. The information is there; it need only be digested. But it can only be done by those willing to understand in the first place. No willingness, no understanding.
This isn't some super-special, above-and-beyond heroic behavior that's being asked of potential buyers, here; it's just common courtesy.
So anyone who doesn't see it your way is just unwilling to understand?