Of late it's been fashionable to cite some bad natty wines as microbial messes.
I admit, that I did have one with Mr. AntiFlavorElite a few months back, this was a 2004 Dard & Ribo St. Joseph, should have been gorgeous but it had gone to the dogs (most probably because of my less than temperature controlled storage.) The wine had gone cabbagey, and had separated into sludge and silt floating in gaseous waters. We tried to muscle through it but gave up.
Would love it if you could share your worst and support it with why?