Until my last breath, I will never tell someone to just dump a beer.
Invest in a carboy or keg, transfer the beer into it, and set it aside. In a year, or two, or three or even just a couple of months, it could be the best thing you ever brewed. Sounds strange to some. But you've already plunked down the money on brewing it, might as well see if time heals those wounds.
And I would also advise to throw away that bucket, and anything else plastic that touched that beer so future batches don't have the chance of meeting the same fate.