We drank it on the wrong day, in the wrong way, in the wrong place.
We drank it too cool, too warm, too soon, too late. We got a bad bottle, from a bad batch, from a bad source. Our glasses were dirty, our palates fatigued. The moon was full, an east wind was blowing, and there was an R in the month.
We’re prejudiced, stupid, closed-minded, and probably liars, too.
Taste is subjective, anyway, and wouldn’t it be boring if we all liked the same things?
Yes, that must be it — that must be why we didn’t like your beer.